Refine
Has Fulltext
- yes (325) (remove)
Year of publication
Document Type
- Doctoral Thesis (325) (remove)
Keywords
- Fernerkundung (15)
- climate change (13)
- remote sensing (13)
- Anden (12)
- Andes (12)
- Klimawandel (12)
- Erdbeben (11)
- Tektonik (10)
- Erosion (9)
- Geomorphologie (9)
- Seismologie (9)
- erosion (9)
- numerische Modellierung (9)
- tectonics (9)
- Argentina (8)
- Argentinien (8)
- Himalaya (8)
- Klima (8)
- Paläoklima (8)
- climate (8)
- geomorphology (8)
- thermochronology (8)
- Holozän (7)
- Neotektonik (7)
- Subduktion (7)
- earthquake (7)
- Geologie (6)
- Geophysik (6)
- Modellierung (6)
- Naturgefahren (6)
- Seesedimente (6)
- Thermochronologie (6)
- stable isotopes (6)
- Biomarker (5)
- Bodenfeuchte (5)
- Central Andes (5)
- Geochemie (5)
- Holocene (5)
- InSAR (5)
- Magnetotellurik (5)
- Monsun (5)
- Paläoklimatologie (5)
- Permafrost (5)
- Zeitreihenanalyse (5)
- Zentralanden (5)
- biomarker (5)
- geology (5)
- kosmogene Nuklide (5)
- lake sediments (5)
- neotectonics (5)
- soil moisture (5)
- subduction (5)
- Arktis (4)
- Chile (4)
- Deformation (4)
- Erdmantel (4)
- Geochronologie (4)
- Geodynamik (4)
- Geothermie (4)
- Himalaja (4)
- Hochwasser (4)
- Rheologie (4)
- Sedimentologie (4)
- Seismology (4)
- Spektroskopie (4)
- Subduktionszone (4)
- Tibetan Plateau (4)
- geochemistry (4)
- geochronology (4)
- geophysics (4)
- induced seismicity (4)
- monsoon (4)
- numerical modeling (4)
- palaeoclimate (4)
- permafrost (4)
- seismic noise (4)
- seismology (4)
- stabile Isotope (4)
- subduction zone (4)
- Africa (3)
- Afrika (3)
- Arctic (3)
- Carbonate (3)
- Central Asia (3)
- Cosmogenic nuclides (3)
- East African Rift (3)
- East African Rift System (3)
- Erdrutsch (3)
- Hydrologie (3)
- Inversion (3)
- Kosmogene Nuklide (3)
- Lake sediments (3)
- Landschaftsentwicklung (3)
- Nachbeben (3)
- Optische Fernerkundung (3)
- PHREEQC (3)
- Paläolimnologie (3)
- Pollen (3)
- Rheology (3)
- Schadensmodellierung (3)
- Seismotektonik (3)
- Simulation (3)
- South America (3)
- Standorteffekte (3)
- Strukturgeologie (3)
- Südamerika (3)
- Vegetation (3)
- Zentralasien (3)
- arctic (3)
- carbon dioxide (3)
- cosmogenic nuclides (3)
- deformation (3)
- faults (3)
- floods (3)
- foreland basin (3)
- geodynamics (3)
- hydrologische Modellierung (3)
- hydrology (3)
- inversion (3)
- landslides (3)
- machine learning (3)
- magnetotellurics (3)
- modeling (3)
- modelling (3)
- monitoring (3)
- natural hazards (3)
- numerical modelling (3)
- numerical simulation (3)
- paleoclimate (3)
- seismic hazard (3)
- simulation (3)
- site effects (3)
- soil organic carbon (3)
- spectroscopy (3)
- time series analysis (3)
- varved lake sediments (3)
- warvierte Seesedimente (3)
- Abbildende Spektroskopie (2)
- Alpen (2)
- Alps (2)
- Anpassung (2)
- Antarktis (2)
- Arava Fault (2)
- Arava-Störung (2)
- Arctic tundra (2)
- Argon (2)
- Black Sea (2)
- Boden (2)
- Bodenbewegungsmodelle (2)
- Bodenhydrologie (2)
- Climate change (2)
- Colombia (2)
- Dead Sea (2)
- Dead Sea Transform (2)
- Deformationsmechanismen (2)
- Denudation (2)
- Diatomeen (2)
- Dichtemodellierung (2)
- Diffusion (2)
- Earth's magnetic field (2)
- East Antarctica (2)
- Eastern Cordillera (2)
- Elbe (2)
- Erdbebenvorhersage (2)
- Erdmagnetfeld (2)
- Europa (2)
- Fluid (2)
- GIS (2)
- GNSS (2)
- GPS (2)
- Gashydrate (2)
- Georadar (2)
- Gewässerfernerkundung (2)
- Gletscher (2)
- Helium (2)
- Hochdruck (2)
- Hyperspektral (2)
- Indien (2)
- Karbonat (2)
- Karbonate (2)
- Klimarekonstruktion (2)
- Kohlenstoff (2)
- Kolumbien (2)
- Küstenerosion (2)
- Lagerstätte (2)
- Landnutzung (2)
- Landnutzungswandel (2)
- Landslide (2)
- Lithosphäre (2)
- Menderes Massif (2)
- Menderes Massiv (2)
- Miocene (2)
- Miozän (2)
- Momententensor (2)
- Monsoon (2)
- Neon (2)
- Oberflächenprozesse (2)
- Opalinus Clay (2)
- Opalinuston (2)
- Orogen (2)
- Ostafrikanisches Grabensystem (2)
- Ostantarktis (2)
- Paleoclimatology (2)
- Paleoseismologie (2)
- Paläogeographie (2)
- Paläomagnetik (2)
- Paläoökologie (2)
- Pamir (2)
- Patagonia (2)
- Perm (2)
- Permian (2)
- Photogrammetrie (2)
- Photogrammetry (2)
- Pirquitas (2)
- Plateau (2)
- Puna (2)
- Quartär (2)
- Reflexionsseismik (2)
- Remote sensing (2)
- Rift (2)
- Riss (2)
- SAR (2)
- Sanierung (2)
- Schwarzes Meer (2)
- Sedimentology (2)
- Sedimenttransport (2)
- Seen (2)
- Seesediment (2)
- Seitenverschiebung (2)
- Spannungsfeld (2)
- Stratigraphy (2)
- Subduction (2)
- Tectonics (2)
- Thermokarst (2)
- Tibet Plateau (2)
- Tien Shan (2)
- Totes Meer Störungssystem (2)
- Tropen (2)
- Tsunami (2)
- Unsicherheiten (2)
- Unsicherheitsanalyse (2)
- Verwerfungen (2)
- Vorlandbecken (2)
- Vulkan (2)
- Vulnerabilität (2)
- Warven (2)
- Wasser (2)
- Wasserhaushalt (2)
- Wetterlagen (2)
- Wärmeleitfähigkeit (2)
- arktische Tundra (2)
- attenuation tomography (2)
- carbon (2)
- coastal erosion (2)
- damage modeling (2)
- deep learning (2)
- diffusion (2)
- displacement (2)
- event synchronization (2)
- exhumation (2)
- extension (2)
- extreme events (2)
- flood risk (2)
- fluid flow (2)
- geothermal energy (2)
- hydraulic fracturing (2)
- hyperspectral (2)
- hyporheic zone (2)
- hyporheische Zone (2)
- imaging spectroscopy (2)
- inverse theory (2)
- isotopes (2)
- komplexes Netzwerk (2)
- lake-level change (2)
- land use change (2)
- landscape evolution (2)
- landslide (2)
- lithosphere (2)
- local structure (2)
- lokale Struktur (2)
- mantle plumes (2)
- marine Terrassen (2)
- maschinelles Lernen (2)
- microbial communities (2)
- moment tensor (2)
- numerische Simulation (2)
- paleoclimatology (2)
- paleoecology (2)
- paleomagnetism (2)
- paleoseismology (2)
- plateau (2)
- reactive transport (2)
- reaktiver Transport (2)
- seismic risk (2)
- seismic tomography (2)
- seismische Gefährdung (2)
- seismisches Rauschen (2)
- seismisches Risiko (2)
- soil (2)
- stress field (2)
- strike-slip fault (2)
- structural geology (2)
- surface heat flow (2)
- surface processes (2)
- suspended sediment (2)
- tectonic geomorphology (2)
- tektonische Geomorphologie (2)
- thermal modeling (2)
- thermische Modellierung (2)
- thermokarst (2)
- trace elements (2)
- tropics (2)
- uplift (2)
- varves (2)
- vegetation (2)
- vulnerability (2)
- water (2)
- water balance (2)
- wavelet (2)
- (Alters-) Datierungen (1)
- 26Al/10Be cosmogenic radionuclides (1)
- 26Al/10Be kosmogene Radionuklide (1)
- 2D Numerical Modelling (1)
- 2D tomography (1)
- 3-D Modellierung (1)
- 3-D outcrop modeling (1)
- 3D Finite Element (1)
- 3D geomechanical numerical model (1)
- 3D geomechanisch-nummerische Modellierung (1)
- 3D numerical models (1)
- 3D numerische Modelle (1)
- 40Ar-39Ar Datierungsmethode (1)
- 40Ar/39Ar (1)
- ASM (1)
- ASPECT (1)
- ASTER Satellitendaten (1)
- ASTER satellite images (1)
- Abbaufrontkartierung (1)
- Abschiebungshorizonte (1)
- Abschätzung der Unsicherheiten (1)
- Absorptionseigenschaften (1)
- Adana Basin (1)
- Adana Becken (1)
- Aeromagnetik (1)
- African climate (1)
- Afrikanisches Klima (1)
- Akkumulationsraten (1)
- Alaunschiefer (1)
- Alborz (1)
- Alkenone (1)
- AlpArray (1)
- Alpine Fault (1)
- Alterationsgeochemie (1)
- Altersdatierung mit kosmogenen Nukliden (1)
- Altersmodelierung (1)
- Altiplano (1)
- Altlasten (1)
- Alum shale (1)
- Amery Oasis (1)
- Amery-Oase (1)
- Amplifier Lakes (1)
- Analogmodell (1)
- Analogue Model (1)
- Analyse komponentenspezifischer Kohlenstoffisotope (1)
- Anatolia (1)
- Anatolien (1)
- Anden / Störung <Geologie> / Strukturgeologie / Magnetotellurik / Chile <Nord> (1)
- Andenplateau Puna (1)
- Andes Centrales (1)
- Angewandte Geophysik (1)
- Anisotrope Inversion (1)
- Anisotropie (1)
- Anisotropie der Leitfähigkeit (1)
- Antarctica (1)
- Antwortspektren (1)
- Apatit-(U-Th)/He Datierung (1)
- Apatit-Spaltspurendatierung (1)
- Apatite (U-Th)/He, apatite fission track dating (1)
- Applied Geophysics (1)
- Ar-Ar geochronology (1)
- Arabian Plate (1)
- Arabische Platte (1)
- Aral Sea (1)
- Aralsee (1)
- Archaeolithoporella (1)
- Archetyp (1)
- Archäomagnetismus (1)
- Arctic nearhore zone (1)
- Arktik (1)
- Array-Entwurf (1)
- Asia (1)
- Asian Summer Monsoon (1)
- Asian monsoon (1)
- Asiatischer Sommermonsun (1)
- Asien (1)
- Asthenosphäre (1)
- Attribut-Analysen (1)
- Attributanalyse (1)
- Auenbereich (1)
- Aufenthaltsdauer (1)
- Aufschluss-Modellierung (1)
- Auftretensrate (1)
- Auslösemechanismus (1)
- Australia (1)
- Australien (1)
- BRDF (1)
- Bachstufen (1)
- Baikalsee (1)
- Baryt (1)
- Basalt-Vulkane (1)
- Bay of Bengal (1)
- Bayes (1)
- Bayes'sche Netze (1)
- Bayesian networks (1)
- Bayesische Statistik (1)
- Beckenentwicklung (1)
- Beckenstruktur (1)
- Beobachtung von Erdbebenquellen (1)
- Bergsturz (1)
- Bergstürze (1)
- Beton (1)
- Beweidung (1)
- Bildbearbeitung (1)
- Biodiversität (1)
- Biogeochemie (1)
- Biogeochemistry (1)
- Biogeowissenschaften (1)
- Blattverschiebung (1)
- Blattwachse (1)
- Blei (1)
- Blockgletscher (1)
- Bodenbewegung (1)
- Bodenbewegungsmodellierung (1)
- Bodenfeuchtigkeit (1)
- Bodenheterogenität (1)
- Bodenkohlenstoff (1)
- Bodenparameter (1)
- Bodenunruhe (1)
- Bodenwasser (1)
- Bodenwassergehalt (1)
- Bohrlochmessungen (1)
- Bohrlochrandausbrüche (1)
- Bolivian tin belt (1)
- Bor (1)
- Bor-isotopen (1)
- Borisotope; Zentrale Anden; kontinentaler Arc-Vulkanismus; Across-arc Variation; Borisotopenfraktionierung; krustale Kontamination (1)
- Boron isotopes (1)
- Boron isotopes; Central Andes; continental arc volcanism; across-arc variation; boron isotope fractionation; crustal contamination (1)
- Boundary element method (1)
- Brandenburg (1)
- Braunsbach Sturzflut (1)
- Braunsbach flash flood (1)
- Bruchausbreitung (1)
- Bruchflaechenstruktur (1)
- Bruchmechanik (1)
- Bruchmodel (1)
- Bruchzähigkeit (1)
- Bucht von Bengalen (1)
- Buntsandstein (1)
- CRS (1)
- Caimancito oil field (1)
- Caimancito-Ölfeld (1)
- Calderas (1)
- Campo petrolero Caimancito (1)
- Canada (1)
- Carbo-Iron (1)
- Carbo-Iron® (1)
- Carbonate-Silicate reactions (1)
- Carbonates (1)
- Carrara marble (1)
- Carrara-marmor (1)
- Causal structure (1)
- Cenozoic aridification (1)
- Cenral Andes (1)
- Central Mediterranean (1)
- Cerrado (1)
- Chaco-Paraná Becken (1)
- Chaco-Paraná basin (1)
- Channel Transmission Losses (1)
- Charnockit (1)
- Chile Rücken (1)
- Chile ridge (1)
- Chilean Andes (1)
- Chirete (1)
- Cimmerian orogeny (1)
- Cinética de fases (1)
- Cinética del querógeno (1)
- Climate (1)
- Climate reconstruction (1)
- Colorado (1)
- Common-Reflection-Surface (1)
- Compound dislocation models (CDMs) (1)
- Computational Fluid Dynamics (CFD) (1)
- Congo Air Boundary (1)
- Contamination Control (1)
- Continental Rifts (1)
- Core-mantle baundary (1)
- Cosmogenic Nuclides (1)
- Coulomb stress (1)
- Coulombspannung (1)
- Cretaceous (1)
- Cretaceous basin (1)
- Cuenca Cretácica (1)
- Cuenca intramontana (1)
- Cyclostratigraphy (1)
- Cyprus arc (1)
- D” Schicht (1)
- D” layer (1)
- DANSER (1)
- Dabie Shan (1)
- Data-Mining (1)
- Datenanalyse (1)
- Datenbearbeitung (1)
- Datenfilter (1)
- Dauer der Bodenbewegung (1)
- Dauerfrostboden (1)
- Deep Learning (1)
- Deformación cuaternaria (1)
- Deformationsquellenmodellierung (1)
- Dehnungsdeformation (1)
- Dendrobaena veneta (1)
- Dendroklimatologie (1)
- Denitrifikation (1)
- Density modelling (1)
- Denudationsraten (1)
- Deuterium Exzesses (1)
- Diagenese (1)
- Diagenesis (1)
- Diaguita (1)
- Diamantstempelzelle (1)
- Diamantstempelzellen (1)
- Diatoms (1)
- Dichteheterogenitäten im oberen Mantel (1)
- Digitale Gesteinsphysik (1)
- Dike (1)
- Dinoflagellatenzyste (1)
- Discrete Element Method (1)
- Diskrete-Elemente-Methode (1)
- Dispersionskurven (1)
- Distally steepened ramps (1)
- Distribution functions with upper bound (1)
- Drohnen-Fernerkundung (1)
- Druck-Temperatur Bedingungen (1)
- Drucklösungsprozesse (1)
- Dryland Rivers (1)
- Dyke (1)
- Dämpfungstomographie (1)
- ENSO (1)
- ETAS (1)
- ETAS Modell (1)
- ETAS model (1)
- EXAFS (1)
- Early Earth (1)
- Earth's mantle (1)
- Earthquake (1)
- Earthquake forecasting (1)
- Earthquake magnitude (1)
- Earthquakes (1)
- East African Plateau (1)
- Eastern Karoo Basin (1)
- Edelgase (1)
- Edelgasisotope (1)
- Eifel (1)
- Eifel Depression (1)
- Eifeler Nord-Süd-Zone (1)
- Einengungsraten (1)
- Einzugsgebiet (1)
- Einzugsgebietshydrologie (1)
- Einzugsgebietsklassifizierung (1)
- Eisdamm (1)
- Eisdynamik (1)
- Eisenbahninfrastruktur (1)
- Eisenia fetida (1)
- Eismodell (1)
- Eklogite (1)
- Elastische Gesteinseigenschaften (1)
- Elastizitätsmodul (1)
- Elbe estuary (1)
- Elbe Ästuar (1)
- Elburs (1)
- Electrical Resistivity Tomography (ERT) (1)
- Electrical resistivity tomography (1)
- Elektrische Widerstandstomographie (ERT) (1)
- EnMAP (1)
- EnMAP Satellit (1)
- EnMAP satellite (1)
- Endlagerung nuklearer Abfälle (1)
- Enhanced Geothermal Systems (1)
- Ensemble analysis (1)
- Ensemble-Analyse (1)
- Entwicklungsländer (1)
- Eocene (1)
- Eozän (1)
- Epithermal Ag-Sn deposits (1)
- Erdbeben Modellierung (1)
- Erdbeben-Magnitude (1)
- Erdbebengefährdungsabschätzungen (1)
- Erdbebenkatalogdaten (1)
- Erdbebenquellen-Array (1)
- Erdbebenschwärme (1)
- Erdbebenschäden (1)
- Erdbebenwechselwirkung (1)
- Erdbeeben (1)
- Erdbeobachtung (1)
- Erdfälle (1)
- Erdrutsche (1)
- Ereignissynchronisation (1)
- Erz (1)
- Erzgebirge (1)
- Etendeka (1)
- Eulerian grid (1)
- Eulerische Gitter (1)
- Eurasian active margin (1)
- Eurasischer aktiver Kontinentalrand (1)
- Europe (1)
- European Alps (1)
- Europäische Alpen (1)
- Event Koinzidenz Analyse (1)
- Exhumationsprozesse (1)
- Exhumationsraten (1)
- Exhumierung (1)
- Expositionsaltersdatierung (1)
- Expositionsmodellen (1)
- Extension (1)
- Extremereignisse (1)
- Extremniederschläge (1)
- Falten (1)
- FastScape (1)
- Fault Healing (1)
- Fault architecture (1)
- Fault interaction (1)
- Fe-Mg-carpholite (1)
- Fehlerquellen der Modellierung (1)
- Feinsedimente (1)
- Feld (1)
- Feldarbeit (1)
- Feldspat (1)
- Felsmechanik (1)
- Fernerkundung an Vulkanen (1)
- Ferroperiklas (1)
- Festigkeit (1)
- Festigkeit des Schiefer (1)
- Finnmark Platform (1)
- Flache Subduktion (1)
- Flachwassercarbonate (1)
- Flat subduction (1)
- Flood Forecasting (1)
- Flood frequency analysis (1)
- Flood regionalisation (1)
- Fluid inclusions (1)
- Fluid-Gesteins-Wechselwirkung (1)
- Fluid-Gesteinswechselwirkungen (1)
- Fluid-Schmelze Wechselwirkung (1)
- Fluid-strömungen (1)
- Fluide (1)
- Fluidströmung (1)
- Fluoreszenzbildgebung (1)
- Flussbettmorphologie (1)
- Flussprozesse (1)
- Flussterrassen (1)
- Flutbasalt (1)
- Flüsse (1)
- Flüssigkeitseinschlüsse (1)
- Flüssigkeitsinklusionen (1)
- Folgenabschätzung (1)
- Foraminifera (1)
- Fore-Arc (1)
- Foreland (1)
- Foreland basin (1)
- Foreland basins (1)
- Formación Yacoraite (1)
- Formationsschaden (1)
- Forstwirtschaft (1)
- Fotogrammetrie (1)
- Fourier spectra (1)
- Fourier-Spektren (1)
- Fracture mechanics (1)
- Freeze-Thaw-Cycles (1)
- Frost-Tau-Wechsel (1)
- Frühdiagenese (1)
- Frühe Erdgeschichte (1)
- Fundament (1)
- GDGT (1)
- GITEWS (1)
- GMPE adjustment (1)
- Gabbro-Eklogit (1)
- Gangschwarm (1)
- Gasgeochemie (1)
- Gaylussite (1)
- Gebietszustand (1)
- Gebirgsbildung (1)
- Gebirgsbäche (1)
- Gebirgshydrologie (1)
- Gebäudenergiebedarf (1)
- Gefahrenanalyse (1)
- Geochronology (1)
- Geodynamic Modeling (1)
- Geodynamic Modelling (1)
- Geodynamiche Modellierung (1)
- Geodynamics (1)
- Geodynamische Modellierung (1)
- Geology (1)
- Geomagnetic activity (1)
- Geomagnetic index (1)
- Geomagnetic observatory (1)
- Geomagnetische Aktivität (1)
- Geomagnetischer Index (1)
- Geomagnetisches Observatorium (1)
- Geomechanical Modelling (1)
- Geomechanik (1)
- Geomechanische Modellierung (1)
- Geomicrobiology (1)
- Geomikrobiologie (1)
- Geomorphology (1)
- Geophysics (1)
- Georgia (1)
- Georgien (1)
- Geosciences (1)
- Geothermal monitoring (1)
- Geothermisches Monitoring (1)
- Geowissenschaften (1)
- Gerinne-Hang-Kopplung (1)
- Gerinnemorphologie (1)
- Germany (1)
- Geschiebetransport (1)
- Gestein-Wasser-Wechselwirkung (1)
- Gesteinsmagnetik (1)
- Glaciers (1)
- Glasstruktur (1)
- Glazialisostasie (1)
- Gletschervorfeld (1)
- Global change (1)
- Global earthquake data (1)
- Global inversion (1)
- Globale Erdbebenkatalogdaten (1)
- Globale Inversion (1)
- Gläser (1)
- Gondwana (1)
- Grabenbrüche (1)
- Gravimetrie (1)
- Gravity (1)
- Ground Motion Prediction Equation (GMPE) (1)
- Groundwater (1)
- Grundgestein (1)
- Grundgesteinshöhe (1)
- Grundwasser (1)
- Grundwasserentwicklung (1)
- Grundwasserneubildung (1)
- HDAC (1)
- HP-HT Experimente (1)
- HP-HT experiments (1)
- HP/LT metamorphism (1)
- HP/LT-Metamorphose (1)
- Halophile (1)
- Hangerosion (1)
- Hanghydrologie (1)
- Hangrutsch (1)
- Hangrutschungen (1)
- Hauptspannungsachse (1)
- Haushalte (1)
- Hawaii (1)
- Hebung (1)
- Hebung des Plateaus (1)
- Hebungsgeschichte (1)
- Hebungsraten (1)
- Hercynian orogeny (1)
- Herdmechanismen (1)
- Herdzeit Parameter Abschätzung (1)
- Heterogenität (1)
- Heterozoan (1)
- Heterozoikum (1)
- Hidden Markov Model (HMM) (1)
- High-pressure/low-temperature rocks (1)
- Himalaja (Kaghan) (1)
- Himalaya (Kaghan Valley) (1)
- Himalaya-Tibet Orogen (1)
- Himalaya-Tibet orogen (1)
- Hochdruck/Niedrigtemperatur Gesteine (1)
- Hochdruckrelikte (1)
- Hochdurchsatzsequenzierung (1)
- Hochland von Tibet (1)
- Hochplateau (1)
- Hochtemperatur Gesteinsdeformtion (1)
- Hochwasserregionalisierung (1)
- Hochwasserrekonstruktion (1)
- Hochwasserrisiko (1)
- Hochwasserrisikoanalysen (1)
- Hochwasserrisikokette (1)
- Hochwasserstatistik (1)
- Hochwassertypen (1)
- Hochwasservorhersage (1)
- Hohlzylinderversuche (1)
- Holzkompost (1)
- Home (1)
- Horizontal flux (1)
- Hotspot (1)
- Hydratbildung (1)
- Hydrogenase (1)
- Hydrogeophysics (1)
- Hydrogeopyhsik (1)
- Hydrogravimetrie (1)
- Hydrological Modelling (1)
- Hydrological extremes (1)
- Hämmerlein (1)
- IHPV (1)
- Ice model (1)
- Iceland (1)
- Imaging spectroscopy (1)
- Impakt (1)
- In-Situ-Analyse (1)
- InSAR Datenanalyse (1)
- InSAR- Techniken (1)
- India (1)
- Indian Monsoon (1)
- Indian Monsoon Circulation (1)
- Indian Summer Monsoon (1)
- Indian summer monsoon (1)
- Indische Monsunzirkulation (1)
- Indische Sommer Monsun (1)
- Indischer Sommermonsun (1)
- Indonesia (1)
- Indonesien (1)
- Induzierte Seismizität (1)
- Injektion (1)
- Injektionsschema (1)
- Interaktion zwischen sich ausbreitenden Riftsegmenten (1)
- Interferometrie (1)
- Interseismic strain rates (1)
- Interseismiche Dehnungsraten (1)
- Intramontane basin (1)
- Intramontanes Becken (1)
- Inverse modelling (1)
- Inversions-Theorie (1)
- Inversionstheorie (1)
- Ionosphäre (1)
- Iran (1)
- Island (1)
- Isotope (1)
- Isotopen (1)
- Isotopenfraktionierung (1)
- Isotopes (1)
- Isábena Einzugsgebiet (1)
- Isábena catchment (1)
- Isótopos de Boro (1)
- Kalahari (1)
- Kanada (1)
- Karakoram (1)
- Karakorum (1)
- Karbonat-Silikat-Reaktionen (1)
- Karbonat-Stabilität (1)
- Karbonatplattformen (1)
- Karbonatrampen (1)
- Karbonatschmelze (1)
- Karpholithe (1)
- Karst (1)
- Kausalstruktur (1)
- Kenia (1)
- Kenya (1)
- Kerguelen (1)
- Kern-Mantel Grenze (1)
- Kerogenkinetik (1)
- Klimatologie (1)
- Klimavariabilität (1)
- Klimaveränderung (1)
- Klimaänderung (1)
- Klimaänderungen (1)
- Knickpoint (1)
- Knickpoint retreat (1)
- Knickpunkt (1)
- Knickpunkt-Rückzug (1)
- Kohlendioxid (1)
- Kohlengrubenabraum (1)
- Kohlenstoff-Budget (1)
- Kohlenstoffdioxid (1)
- Kohlenstoffisotope (1)
- Kohlenstoffkreislauf (1)
- Kohlenstoffspeicher (1)
- Kolloidtransport (1)
- Kongo Luftmassengrenze (1)
- Konin region (1)
- Kontaminationskontrolle (1)
- Kontinentale Kollision (1)
- Kontinentalrand (1)
- Koppelung (1)
- Korallen (1)
- Korrelation (1)
- Kreide (1)
- Kreidebecken (1)
- Kriecheigenschaften (1)
- Kruste (1)
- Krustenstruktur der Süd-Türkei (1)
- Krustenstruktur des Eratosthenes Seeberges (1)
- Krustenverformungen (1)
- Kugelflächenfunktionen (1)
- Kultivierung (1)
- Kumamoto Erdbeben (1)
- Kumamoto earthquake (1)
- Kupfer (1)
- Känozoische Aridifizierung (1)
- Küste (1)
- Küstenlinien (1)
- LA-ICP-MS (1)
- LGM (1)
- Lake Baikal (1)
- Lake Challa (1)
- Lake Naivasha (1)
- Lake Van (1)
- Land use change (1)
- Landformen (1)
- Landnutzungsänderung (1)
- Landsat. (1)
- Landscape Evolution (1)
- Landschaftseffekte (1)
- Landschaftspräferenzen (1)
- Landwirtschaft (1)
- Laser ablation (1)
- Laserheizsystem (1)
- Last Glacial (1)
- Late Quaternary (1)
- Lateglacial (1)
- Lava dome (1)
- Lavadom (1)
- Lavafontänen (1)
- Lawinen (1)
- Lena Delta (1)
- Letztes Glazial (1)
- Lichenometrie (1)
- Limnologie (1)
- Liquiñe-Ofqui Störungszone (1)
- Liquiñe-Ofqui fault zone (1)
- Lithium (1)
- Lithospheric Deformation (1)
- Lithospheric strength (1)
- Lithosphärenfestigkeit (1)
- Lithosphärische Deformation (1)
- Llaima Vulkan (1)
- Llaima volcano (1)
- Lokalisierte Deformation (1)
- Lokalisierung von Deformation (1)
- Lokalisierung von Verformung (1)
- Lonar lake (1)
- Lonarsee (1)
- Loppa High (1)
- Lower Devonian (1)
- Lusatia (1)
- Luxembourg (1)
- Luxemburg (1)
- Lycian Nappes (1)
- Lykischen Decken (1)
- Lysimeter (1)
- MC-ICP-MS (1)
- Mackenzie Delta (1)
- Mackenzie-Delta (1)
- Magma-Entgasung (1)
- Magmagänge (1)
- Magmatismus (1)
- Magnesit (1)
- Magnetostratigraphie (1)
- Magnetotelluric (1)
- Mahalanobis distance (1)
- Mahalanobis-Distanz (1)
- Malta (1)
- Mantel (1)
- Mantel Plume (1)
- Mantelplumes (1)
- Mantle (1)
- Mantle Plume (1)
- Mantleplumes (1)
- Marmarameer (1)
- Martinez del Tineo (1)
- Massenaussterben (1)
- Massenversatzprozesse (1)
- Mediterranes Tiefdrucksystem (1)
- Meditteranean sea (1)
- Meeressedimente (1)
- Melilitit (1)
- Melt inclusions (1)
- Merapi (1)
- Mesozoic (1)
- Mesozoikum (1)
- Metamorphism (1)
- Metamorphose (1)
- Metasomatism (1)
- Metasomatose (1)
- Methan (1)
- Methanhydrat (1)
- Mexico (1)
- Mexiko (1)
- Middle East (1)
- Migration (1)
- Mikro-CT (1)
- Mikrobieller Abbau von organischen Material (1)
- Mikroplatte (1)
- Mikrostruktur (1)
- Mikrostrukturelle (1)
- Mikrostrukturen (1)
- Mineralogie (1)
- Mineralreaktion (1)
- Mineralverwitterungsreaktionen (1)
- Mineralzusammensetzung (1)
- Mittelmeer (1)
- Mittelmeerraum (1)
- Mixmodelle (1)
- Model (1)
- Modell (1)
- Modellanpassung (1)
- Modellierung der Wassertrübung (1)
- Modellierung des seismischen Zyklus (1)
- Molybdän (1)
- Moment tensor inversion (1)
- Momententensoren (1)
- Momententensorinversion (1)
- Monazit (1)
- Mondsee (1)
- Mongolei (1)
- Mongolia (1)
- Morphometrie (1)
- Morphometry (1)
- Multi-Hazard (1)
- Multiproxy-Untersuchung (1)
- Multiskalen Netzwerk (1)
- Multivariate Analyse (1)
- Multivariate statistic (1)
- Muscovit (1)
- Muster der Bodenfeuchte (1)
- Mustererkennung (1)
- NAO (1)
- NW Himalaja (1)
- NW Himalaya (1)
- Naher Osten (1)
- Naivasha See (1)
- Namche Barwa (1)
- Namibia (1)
- Nanoeisen (1)
- Natural Hazards (1)
- Naturrisiken (1)
- Natürliche Staudämme (1)
- Near-surface geophysics (1)
- Neotectonics (1)
- Nettorotation der Lithosphäre (1)
- Neutronen (1)
- Nicht-Einmaligkeit (1)
- Niederschlag (1)
- Niedrigwasser (1)
- Niger (1)
- Non-uniqueness (1)
- Nordanatolische Störungszone (1)
- Nordostdeutsches Becken (1)
- Nordostdeutsches Tiefland (1)
- North Anatolian Fault Zone (1)
- North-East German Plain (1)
- Northeast German Basin (1)
- Numerische 2D Modellierung (1)
- Nährstoffe (1)
- Nährstoffeinträge (1)
- Nährstoffretention (1)
- ODP Leg 194 (1)
- Oberfläche (1)
- Oberflächenexpositionsdatierung (1)
- Oberflächennahe Geophysik (1)
- Oberflächenwärmefluss (1)
- Oberflächenwärmefluß (1)
- Ocean Colour satellite data (1)
- Oligo-Miocene (1)
- Oligozän-Miozän-Grenze (1)
- OpenStreetMap (1)
- Optical remote sensing (1)
- Optical sensor (1)
- Optische Sensoren (1)
- Organic matter mineralization (1)
- Organofazies (1)
- Ostafrika (1)
- Ostafrikanisches Rift (1)
- Ostafrikanisches Riftsystem (1)
- Ostafrikansches Rift (1)
- Ostkordillere (1)
- PM10, PM2, PM1 (1)
- PPGIS (1)
- Palaeoklima (1)
- Paleoclimate (1)
- Paleoclimate dynamics (1)
- Paleofloods (1)
- Paleogeography (1)
- Paleolimnology (1)
- Paleomagnetism (1)
- Paleomagnetismus (1)
- Paläo-See Mweru (1)
- Paläo-Strain-Berechnung (1)
- Paläoaltimetrie (1)
- Paläohochwasser (1)
- Paläohydrologie (1)
- Paläointensität (1)
- Paläoklimadynamik (1)
- Paläomagnetismus (1)
- Paläosekularvariation (1)
- Paläotektonik (1)
- Paläotopographie (1)
- Pamir-Tien Shan (1)
- Panasqueira (1)
- Parallel Seismik (1)
- Paris Basin (1)
- Pariser Becken (1)
- Particle swarm optimization (1)
- Partikel Swarm Optimierung (1)
- Partikelschwarm-Optimierung (1)
- Passive Kontinentalränder (1)
- Passive margins (1)
- Patagonien (1)
- Patagonien ; Neogen ; Hebung ; Subduktion ; Anden (1)
- Pattern Recognition (1)
- Periglazial (1)
- Periglazialgeomorphologie (1)
- Permafrost-Taustörungen (1)
- Permafrostdegradation (1)
- Permafrostlandschaften (1)
- Permafrostsedimente (1)
- Permeabilität (1)
- Permeabilitätsentwicklung (1)
- Petrologie (1)
- Petrology (1)
- Pfahl (1)
- Pflanzen-Habitat Interaktionen (1)
- Pflanzenwachs (1)
- Pflanzenwachstum (1)
- Pflanzenwasserzustand (1)
- Pflaume (1)
- PhaseKinetics (1)
- Phasenkinetik (1)
- Photozoan (1)
- Photozoikum (1)
- Phytoplankton (1)
- Plattenbewegungen (1)
- Playa (1)
- Plume-Rücken Interaktion (1)
- Poland (1)
- Polarimetrie (1)
- Polarimetry (1)
- Polen (1)
- Pollenanalyse (1)
- Pollenproduktivitätsschätzungen (1)
- Polynia (1)
- Pontiden (1)
- Pontides (1)
- Porentypen in Karbonate (1)
- Porphyrische Kupferlagerstätte (1)
- Posidonia shale (1)
- Posidonienschiefer (1)
- Probabilistic regional envelope curves (1)
- Probabilistische Regionale Hüllkurven (1)
- Probenahmestrategie (1)
- Procrustes rotation analysis (1)
- Prokrustes Analyse (1)
- Prozessidentifikation (1)
- Präzision Gartenbau (1)
- Prüfköpfe (1)
- Psychologie (1)
- Puna plateau (1)
- Quantitative Daten (1)
- Quartäre Deformation (1)
- Quaternary (1)
- Quaternary deformation (1)
- Quell-Array optimales Design (1)
- Quelle Inversion (1)
- Quellenparameter (1)
- Quellenumkehr (1)
- REVEALS (1)
- Radiokarbondatierung (1)
- Raman spectroscopy (1)
- Raman-Spektroskopie (1)
- Ramos X-11 (1)
- Randelementmethode (1)
- Rauheit (1)
- Raumwellen (1)
- Reaktionspfadmodellierung (1)
- Reaktivierung von Störungszonen (1)
- Receiver Function (1)
- Regensturm (1)
- Region Konin (1)
- Regional Climate Model (1)
- Regressionsanalyse (1)
- Regularisierung (1)
- Reibung an Plattengrenzen (1)
- Reifegradbezogene Biomarker (1)
- Remote Sensing (1)
- Rhenohercynian Zone (1)
- Rhenohercynische Zone (1)
- Rheological modeling (1)
- Rheologische Modellierung (1)
- Rhizosphere (1)
- Riff (1)
- Ringstörungen (1)
- Risikoanalyse (1)
- Risikobewertung von Vulkanausbrüchen (1)
- Risikokommunikation (1)
- Rissmechanik (1)
- Risstransmissivität (1)
- Russian Arctic (1)
- Réunion (1)
- Río Pescado (1)
- Röntgenabsorptionspektroskopie (1)
- Röntgenabsorptionsspektroskopie (1)
- Rückenkollision (1)
- Rückensubduktion (1)
- SEC (1)
- SIMS (1)
- SWIM (1)
- Sachsengängerei (1)
- Salt pan (1)
- Salta Rift (1)
- Salta basin (1)
- Salta-Becken (1)
- Salzgestein (1)
- Salzpfanne (1)
- San Andreas Fault (1)
- San Andreas Verwerfung (1)
- Sandstein (1)
- Santa Cruz formation (1)
- Saprolit (1)
- Sardinia (1)
- Sardinien (1)
- Satelliten-Fernerkundung (1)
- Satellitenbilder (1)
- Satellitenmission Swarm (1)
- Sauerstoff (1)
- Sauerstoffisotope (1)
- Savannen-Ökologie (1)
- Saxo-Thuringia (1)
- Scaling (1)
- Schaden (1)
- Schallemissionen (1)
- Scherzonen (1)
- Schmelzeinschlüsse (1)
- Schmelzstruktur (1)
- Schnee (1)
- Schwarmbeben (1)
- Schwerkraft (1)
- Sea of Marmara (1)
- SeaWiFS Ocean-Colour Satellitendaten (1)
- Sediment Fingerprinting (1)
- Sedimentationsdynamik (1)
- Sedimentbecken (1)
- Sedimente (1)
- Sedimentenabfolge (1)
- Sedimentfalle (1)
- Sedimentfazies (1)
- Sedimentfracht (1)
- Sedimentmächtigkeit (1)
- Sedimentquellenidentifizierung (1)
- Sedimenttransportsystem (1)
- Sedimentvolumen (1)
- Seeausbrüche (1)
- Seedurchmischung (1)
- Seespiegelschwankungen (1)
- Seestandsänderung (1)
- Seesystemreaktionen (1)
- Seewasserhaushalt (1)
- Seismic Array Methods (1)
- Seismic arrays (1)
- Seismik (1)
- Seismische Arrays (1)
- Seismische Geschwindigkeiten (1)
- Seismische Interferometrie (1)
- Seismische Tomographie (1)
- Seismizität und Tektonik (1)
- Seismizitätsmodellierung (1)
- Seltenerdelemente (1)
- Shortening (1)
- Shortening rates (1)
- Shyok Fluss (1)
- Shyok River (1)
- Siberia (1)
- Sibirien (1)
- Sibirien <Nord> (1)
- Sibirienhoch (1)
- Sierras Pampeanas (1)
- Signalbildung (1)
- Signalweiterleitung (1)
- Silikatschmelze (1)
- Silikatverwitterung (1)
- Sinkholes (1)
- Skala (1)
- Skalierung (1)
- Skarn (1)
- Sn (1)
- Software (1)
- Soil hydrology (1)
- Soil moisture (1)
- Solar irradiation (1)
- Solare Austrahlung (1)
- Sorption (1)
- South Chile (1)
- South Eifel (1)
- Southatlantic (1)
- Space climate (1)
- Space weather (1)
- Spalt Spuren (1)
- Spalteneruption (1)
- Spannung (1)
- Spannungsfeld des späten Känozoikums (1)
- Spannungsmessung (1)
- Spannungsmuster (1)
- Spannungsänderungen (1)
- Spektralanalyse (1)
- Spiti valley (1)
- Spitsbergen (1)
- Spity Valley (1)
- Spitzbergen (1)
- Spread F (1)
- Spröde Vorläufer (1)
- Spurenelement-Partitionierung (1)
- Spurenelementverteilung (1)
- Spätglazial (1)
- Spätquartär (1)
- Sri Lanka (1)
- Stabile Isotope (1)
- Stabile Isotopen (1)
- Stabile Sauerstoff- und Kohlenstoffisotope (1)
- Stalagmiten (1)
- Standort des Streuers (1)
- Statistical seismology (1)
- Statistische Seismologie (1)
- Stochastischer Algorithmus (1)
- Strahlung und chemische Eigenschaften (1)
- Strain Localisation (1)
- Strain Localization (1)
- Stratigrafie (1)
- Stratigraphie (1)
- Stream Power Law (1)
- Stressmodellierung (1)
- Strike-Slip Störungen (1)
- Strike-slip fault (1)
- Stromsektor (1)
- Strukturmodellierung (1)
- Sturzfluten (1)
- Städe (1)
- Städte Effizienz (1)
- Störungen (1)
- Störungsbau (1)
- Störungsinteraktion (1)
- Störungszonenarchitektur (1)
- Subduktionsbeben (1)
- Subsidenzgeschichte (1)
- Subsurface Biosphere (1)
- Suguta Tal (1)
- Suguta Valley (1)
- Suigetsu (1)
- Sulfatreduktion (1)
- Sumatra Störung (1)
- Sumatra fault (1)
- Superconducting gravimetry (1)
- Supraleit-Gravimetrie (1)
- Supraleitender Gravimeter (SG) (1)
- Suspendsionsfracht (1)
- Sweet (1)
- Synchronisation von Ereignissen (1)
- Syntaxe (1)
- Synthetic Aperture Radar (1)
- Synthetische Sandsteine (1)
- Süd Chile (1)
- Süd-Türkei (1)
- Südatlantik (1)
- Südeifel (1)
- TDR (1)
- Taifune (1)
- Tarutung (1)
- Tasas de acortamiento (1)
- Tectona grandis (1)
- Tectonic geomorphology (1)
- Tektonische Geomorphologie (1)
- Temperatur (1)
- Temperaturfeld (1)
- Tendürek Vulkan (1)
- Tendürek volcano (1)
- Thermal (1)
- Thermal modeling (1)
- Thermal-conductivity (1)
- Thermisch (1)
- Thermische Modellierung (1)
- Thermokarstprozesse (1)
- Tian Shan (1)
- Tian-Shan (1)
- Tibet (1)
- Tiefendeformation (1)
- Tiefenversickerung (1)
- Tiefer See (1)
- Tien-Shan (1)
- Tiltmeter (1)
- Time series analysis (1)
- Tomographie (1)
- Tomographie des elektrischen Widerstands (1)
- Tonmineralien (1)
- Topographie (1)
- Torsion Experiments (1)
- Torsionsexperimente (1)
- Tote Meer (1)
- Totes Meer (1)
- Transferverluste in Flüssen (1)
- Transformation (1)
- Transformation hydrologischer Signale (1)
- Transformstörung (1)
- Transnationalismus (1)
- Treibhausgase (1)
- Trendanalysen (1)
- Triangular dislocations (TDs) (1)
- Trier-Luxembourg Basin (1)
- Trier-Luxembourg Embayment (1)
- Trier-Luxemburger Becken (1)
- Trier-Luxemburger Bucht (1)
- Tritium Assay (1)
- Tritium Versuchsanordnung (1)
- Trockenflüsse (1)
- Tsunami-Frühwarnsystem (1)
- Tsunami-Risiko (1)
- Turbidite (1)
- Turbidites (1)
- Turmalin (1)
- U-Pb Geochronologie (1)
- U-Pb geochronology (1)
- UHI (1)
- UHP (1)
- UV fs laser ablation (1)
- UV-Lasermikrodissektion (1)
- UV-laser microdissection (1)
- Ultraschall (1)
- Umweltmonitoring (1)
- Umweltrekonstruktion (1)
- Uncertainty Analysis (1)
- Unsupervised Learning (1)
- Unterdevon (1)
- Untergrund (1)
- Untergrunduntersuchung der Biosphäre (1)
- Untertage-Kohlevergasung (1)
- Unüberwachtes Lernen (1)
- Uplift Rates (1)
- Uran (1)
- Uran-Blei-Datierung (1)
- Vansee (1)
- Variabilität (1)
- Variabilität von Bodenbewegung (1)
- Vegetationsbedeckung (1)
- Verarbeitung seismischer Daten (1)
- Verdichtung (1)
- Verformungslokalisierung (1)
- Verkürzung (1)
- Verschüttungsaltersdatierung (1)
- Verteilungsfunktionen mit einer oberen Grenze (1)
- Vertical flux (1)
- Vertreibung (1)
- Verwitterungsfeedback (1)
- Videoanalyse (1)
- Viskositätsstruktur im oberen Mantel (1)
- Vogtland (1)
- Volcano (1)
- Volcano deformation modelling (1)
- Vorelandbecken (1)
- Vorhersage (1)
- Vorland (1)
- Vorlandbeckenentwicklung (1)
- Vorlanddeformation (1)
- Vs Profile (1)
- Vs profiles (1)
- Vulcano (1)
- Vulkan Verformung (1)
- Vulkaniklastika (1)
- Vulkanismus (1)
- Vulkanologie (1)
- Vulkanverformungsmodellierung (1)
- Vulkanüberwachung (1)
- Waldbewirtschaftung (1)
- Waldumbau (1)
- Warve (1)
- Warves (1)
- Wasser-Gesteins-Wechselwirkungen (1)
- Wasser-Monitoring (1)
- Wasserdampf (1)
- Wassergütemodellierung (1)
- Wasserpflanzen (1)
- Wasserqualität (1)
- Wasserspeicheränderungen (1)
- Water resources (1)
- Wavelet (1)
- Weilerbach-Mulde (1)
- Well-log analysis (1)
- Wellenausbreitung (1)
- Wellenbrechung und Diffraktion (1)
- Wellengeschwindigkeit (1)
- Wellenleiter (1)
- Weltraumklima (1)
- Weltraumwetter (1)
- West Bohemia (1)
- West Fault Zone (1)
- West Turkey (1)
- West Türkei (1)
- Windböen (1)
- Winddynamik (1)
- Winderosion (1)
- Wirtsgesteinsskala (1)
- Wittlicher Senke (1)
- Wofram-Zinn Lagerstätte (1)
- Wuchiapingian (1)
- Wuchiapingium (1)
- X-ray absorption spectroscopy (1)
- XANES (1)
- XAS (1)
- XRF (1)
- Yacoraite Formation (1)
- Yarlung-Tsangpo Gorge (1)
- Yarlung-Tsangpo Schlucht (1)
- Yatta (1)
- Young's modulus (1)
- Zeitanhängig (1)
- Zeitserie (1)
- Zeitskala (1)
- Zentral Asien (1)
- Zerstörungsfreie Prüfung (1)
- Zink (1)
- Zinn (1)
- Zusammengesetztes Dislokationsmodel (CDM) (1)
- Zustands-Übergangs-Modelle (1)
- Zyklostratigraphie (1)
- Zypernbogen (1)
- accumulation rates (1)
- acoustic emissions (1)
- activ continental margin (1)
- active faulting (1)
- active seismic (1)
- active source data (1)
- adapation (1)
- adaptation (1)
- aero (1)
- aftershock (1)
- aftershock sequence (1)
- aftershocks (1)
- age modeling (1)
- age-related biomarkers (1)
- agriculture (1)
- aktive Quelldaten (1)
- aktive Seismik (1)
- aktive Verwerfungen (1)
- aktive Weitewinkel-Seismik (1)
- aktiver Kontinentalrand (1)
- alkenones (1)
- allochthon (1)
- alluvial channel morphology (1)
- alteration geochemistry (1)
- anaerobe Inkubationensexperimente (1)
- anaerobic incubation experiments (1)
- anisotropic inversion (1)
- anisotropy (1)
- antecedent conditions (1)
- aquatic ecosystems (1)
- aquatischen Ökosystemen (1)
- archeomagnetism (1)
- archetype (1)
- arctic water bodies (1)
- argon (1)
- arktische Gewässer (1)
- arktischer Nahküstenbereich (1)
- array design (1)
- artificial mixtures (1)
- artificial neural networks (1)
- asthenosphere (1)
- asthenospheric slab-window (1)
- asthenospherisches "slab-window" (1)
- asymmetric pair distribution function (1)
- attribute analysis (1)
- authigene Mineralbildung (1)
- authigenic mineral formation (1)
- autochthon (1)
- automatic classification (1)
- automatische Klassifizierung (1)
- b-Wert Kartierung (1)
- b-value map (1)
- barite (1)
- basaltic volcanoes (1)
- basement rock (1)
- basin evolution (1)
- basin structure (1)
- bedload transport (1)
- bedrock elevation (1)
- beginnende Kontinent-Kontinent Kollision (1)
- beobachtende Seismologie (1)
- biodegradación (1)
- biodegradation (1)
- biodiversity (1)
- biogeoscience (1)
- biologischer Abbau (1)
- biomarcadores diagnósticos de edad (1)
- biomarcadores diagnósticos de madurez (1)
- body waves (1)
- bolivianischen Zinngürtels (1)
- borehole breakouts (1)
- boron (1)
- bottom water (1)
- brittle deformation (1)
- brittle precursors (1)
- burial dating (1)
- campo de esfuerzo del Cenozoico tardío (1)
- carbon budget (1)
- carbon cycling (1)
- carbon isotopes (1)
- carbonate (1)
- carbonate melt (1)
- carbonate platforms (1)
- carbonate pore types (1)
- carbonate ramps (1)
- carbonate stability (1)
- carbonate systems (1)
- carbonates (1)
- carpholite (1)
- catchment (1)
- catchment classification (1)
- catchment hydrology (1)
- catchment state (1)
- central Andes (1)
- central-eastern Beringia (1)
- channel steps (1)
- channel-hillslope coupling (1)
- charnockite (1)
- chemical dating (1)
- chemical weathering (1)
- chemische Datierung (1)
- chemische Verwitterung (1)
- chilenische Anden (1)
- circular statistics (1)
- cities (1)
- classification (1)
- clay mineral (1)
- clima (1)
- climate dynamics (1)
- climate extreme events (1)
- climate global and local patterns (1)
- climate impacts (1)
- climate reconstruction (1)
- climate variability (1)
- climatic change (1)
- climatolgoy (1)
- closed chamber method (1)
- coal mine waste (1)
- coast (1)
- coesite (1)
- coherence (1)
- colloid transport (1)
- combinatorial inverse modelling (1)
- complex network (1)
- complex networks (1)
- compound-specific stable carbon isotope analyses (1)
- compression (1)
- computational seismology (1)
- computergestützte Seismologie (1)
- concrete (1)
- conductivity anisotropy (1)
- continental breakup (1)
- continental collision (1)
- continental margins (1)
- controlled source wide angle seismic (1)
- controlo estrutural (1)
- copper (1)
- corals (1)
- correlation (1)
- cosmic rays (1)
- cosmic-ray (1)
- cosmogenic nuclide dating (1)
- cosmogenic radionuclide-based dating (1)
- cosmogenic radionuclides (1)
- counterclockwise block rotation between overlapping rift segments (1)
- coupled fluid and heat transport (1)
- coupling (1)
- crack (1)
- creep properties (1)
- critical zone (1)
- crop modeling (1)
- crust (1)
- crustal deformations (1)
- crustal stress (1)
- crustal structure of south central Turkey (1)
- crustal structure of the Eratosthenes Seamount (1)
- cuenca intermontana (1)
- cultivation (1)
- d-excess (1)
- damage (1)
- damage modelling (1)
- data analysis (1)
- data filtering (1)
- data processing (1)
- data-mining (1)
- deep carbon (1)
- deep convection (1)
- deep seepage (1)
- deforestation (1)
- deformation mechanisms (1)
- deformation source modeling (1)
- dendroclimatology (1)
- denitrification (1)
- density modeling (1)
- density-driven flow (1)
- denudation (1)
- denudation processes (1)
- denudation rates (1)
- deposits (1)
- depósitos de volfrâmio-estanho (1)
- der Städtische Wärmeinseleffekt (1)
- der Urbane Hitzeinsel Effekt (1)
- der Urbane Hitzeinsel Effekt basierend auf Landoberflächentemperatur (1)
- developing countries (1)
- diagenesis (1)
- diagenetische Prozesse (1)
- diamond anvil cell (1)
- diamond anvil cells (1)
- diatoms (1)
- dichtegetriebene Strömung (1)
- die Stadtform (1)
- digital image analysis (1)
- digital rock physics (1)
- digitale Bildanalyse (1)
- dike pathways (1)
- dispersion curves (1)
- distal steil ansteigende Rampen (1)
- dreieckige Dislokationen (TDs) (1)
- duration (1)
- dynamic topography (1)
- dynamische Topographie (1)
- décollement (1)
- early diagenesis (1)
- early earth tectonics (1)
- earth mantle (1)
- earth's mantle (1)
- earthquake bulletin data (1)
- earthquake damage (1)
- earthquake forecasting (1)
- earthquake interaction (1)
- earthquake location (1)
- earthquake modeling (1)
- earthquake source array (1)
- earthquake source observations (1)
- earthquake swarm (1)
- earthquake swarms (1)
- earthquakes (1)
- eastern south–central Andes (1)
- eclogite (1)
- eclogite (UHP) (1)
- eco-hydrological modelling (1)
- ecohydrology (1)
- ecological modelling (1)
- economic impacts (1)
- effective porosity (1)
- effektive Porosität (1)
- elastic rock properties (1)
- electric and magnetic fields (1)
- electrical conductivity (1)
- elektrische Leitfähigkeit (1)
- elektrische und magnetische Felder (1)
- energy demand (1)
- enhanced geothermal system (1)
- enhanced geothermal systems (EGS) (1)
- environmental monitoring (1)
- environmental reconstruction (1)
- epithermale Zinn-Silber-lagerstätte (1)
- equatorial electrojet (1)
- equatorial plasma depletions (1)
- ererbte Strukturen (1)
- estuary (1)
- event coincidence analysis (1)
- exhumation processes (1)
- exhumation rates (1)
- exposure (1)
- exposure age dating (1)
- extreme Ereignisse (1)
- extreme Klimaereignisse (1)
- extreme hydro-meteorologische Ereignisse (1)
- extreme hydrometeorological events (1)
- extreme rainfall (1)
- failed rift (1)
- fallamiento activo (1)
- fault healing (1)
- fault plane structure (1)
- fault reactivation (1)
- fault zone architecture (1)
- feldspar (1)
- ferropericlase (1)
- fieldwork (1)
- finite Differenzen (1)
- finite Elemente (1)
- finite difference simulation (1)
- finite differences (1)
- finite elements (1)
- fission track (1)
- fissure eruption (1)
- flash floods (1)
- flood (1)
- flood events (1)
- flood reconstruction (1)
- flood risk analysis (1)
- flood types (1)
- flood volcanism (1)
- flooding (1)
- floodplain inundation (1)
- fluid (1)
- fluid inclusions (1)
- fluid rock interaction (1)
- fluid-melt interaction (1)
- fluid-rock interactions (1)
- fluorescence imaging (1)
- fluvial fill terraces (1)
- fluvial incision (1)
- fluviale Einschneidung (1)
- fluxo de fluidos (1)
- focal mechanisms (1)
- folds (1)
- foraminifera (1)
- fore-arc (1)
- forecast (1)
- foreland deformation (1)
- forest conversion (1)
- forest management (1)
- forestry (1)
- formation damage (1)
- foundation (1)
- fracture growth (1)
- fracture mechanics (1)
- fracture toughness (1)
- fracture transmissivity (1)
- fracture-controlled (1)
- gas geochemistry (1)
- gas hydrates (1)
- geführte Wellen (1)
- gegen den Uhrzeigersinn gerichtete Rotation von Krustenblöcken zwischen zwei überlappenden Riftsegmenten (1)
- gekoppelter Fluid-und Wärmetransport (1)
- geodynamic modeling (1)
- geodynamic models (1)
- geodynamische Modelle (1)
- geodynamische Modellierung (1)
- geohazards (1)
- geologic fault (1)
- geologische Störungen (1)
- geologische Verwerfung (1)
- geomagnetic excursions (1)
- geomagnetische Exkursionen (1)
- geomechanical modelling (1)
- geomechanics (1)
- geomechanische Modellierung (1)
- geophyics (1)
- geophysical methods (1)
- geophysikalische Methoden (1)
- geoquímica da alteração hidrotermal (1)
- geothermal (1)
- geothermal exploration (1)
- geothermal monitoring (1)
- geothermics (1)
- geothermische Exploration (1)
- geothermische Überwachung (1)
- geothermischer Reservoire (1)
- geschlossene Haubenmessmethode (1)
- gestreute Phasen (1)
- glacial incision (1)
- glacial isostatic adjustment (1)
- glacier forefield (1)
- glaciers (1)
- glass structure (1)
- glasses (1)
- glaziale Einschneidung (1)
- global flood model (1)
- global inversion (1)
- global navigation satellite systems (1)
- globale Inversion (1)
- globale und lokale Muster des Klimas (1)
- globales Navigationssatellitensystem (1)
- globales Positionsbestimmungssystem (1)
- globales Überschwemmungsmodell (1)
- grandes movimientos en masa (1)
- gravimetry (1)
- grazing (1)
- greenhouse gases (1)
- ground motion modeling (1)
- ground motion variability (1)
- ground motions (1)
- ground penetrating radar (1)
- ground-motion models (1)
- ground-penetration radar (1)
- groundwater evolution (1)
- groundwater recharge (1)
- große Massenbewegungen (1)
- guided waves (1)
- halophiles (1)
- hazard assessments (1)
- helium (1)
- herzynische Orogenese (1)
- heterogeneity (1)
- heterozoan carbonates (1)
- heterozoisch (1)
- high pressure (1)
- high pressure relicts (1)
- high temperature rock deformation (1)
- high-pressure (1)
- high-pressure incubation system (1)
- high-pressure metasediments (1)
- hillslope diffusion (1)
- hillslope hydrology (1)
- historical earthquakes (1)
- historische Erdbeben (1)
- hochdruckmetamorphe Sedimente (1)
- hollow cylinder experiments (1)
- holocene (1)
- horizontaler Fluss (1)
- host rock scale (1)
- human impact (1)
- hydrate (1)
- hydrate formation (1)
- hydraulic simulation (1)
- hydraulische Risserzeugung (1)
- hydraulisches Aufbrechen (1)
- hydro-meteorological risk (1)
- hydro-meteorologische Risiken (1)
- hydrogravimetry (1)
- hydrological flow paths (1)
- hydrological modelling (1)
- hydrological monitoring and modelling (1)
- hydrologische Fließpfade (1)
- hydrologische Vorbedingungen (1)
- hydrothermal (1)
- hydrothermal systems (1)
- hydrothermale Alteration (1)
- hydrothermale Systeme (1)
- hyperspectral remote sensing (1)
- hyperspektral (1)
- hyperspektral Fernerkundung (1)
- ice dam (1)
- ice dynamics (1)
- image processing (1)
- impact (1)
- impact assessment (1)
- in-situ analysis (1)
- in-situ remediation (1)
- in-stream processes (1)
- incipient continent-continent collision (1)
- indischer Monsun (1)
- induzierte Seismizität (1)
- induzierten Seismizität (1)
- inherited structures (1)
- injection (1)
- injection scheme (1)
- instrumental seismology (1)
- instrumentelle Seismologie (1)
- inter- and intra-station variability (1)
- interferometry (1)
- intermontane Becken (1)
- intermontane Talverfüllungen (1)
- intermontane basin (1)
- intermontane valley fill (1)
- inverse Modellierung (1)
- inverse Modellirung (1)
- inverse modeling (1)
- ionosphere (1)
- isostatic uplift (1)
- isostatische Hebung (1)
- isotopic fractionation (1)
- kerogen kinetics (1)
- kimmerische Orogenese (1)
- kombinatorische inverse Modellierung (1)
- kontinuierlicher Simulationsansatz (1)
- kosmische Neutronenstrahlung (1)
- kosmische Strahlung (1)
- kosmogene Radionuklid-basierte Datierung (1)
- kritische Zone (1)
- krustale Spannungen (1)
- künstliche neurale Netzwerke (1)
- lacustrine record (1)
- lake (1)
- lake mixing (1)
- lake sediment (1)
- lake system responses (1)
- lakes (1)
- lakes water balance (1)
- lakustrine Abfolge (1)
- lamprophyre (1)
- land use (1)
- land-use change (1)
- landforms (1)
- landscape preferences (1)
- landscape effects (1)
- landscape hydrology (1)
- large mass movements (1)
- laser heating (1)
- laser-geheizte Diamantstempelzelle (1)
- laser-heated Diamond Anvil Cell (1)
- late cenozoic stress field (1)
- late holocene (1)
- lava fountains (1)
- lead (1)
- leaf wax (1)
- lichenometry (1)
- lineare spektrale Entmischung (1)
- lipid biomarkers (1)
- lithium (1)
- lithosphere net rotation (1)
- lithosphere stress field (1)
- lithosphärisches Spannungsfeld (1)
- local Seismicity (1)
- localized deformation (1)
- lokale Seismitität (1)
- low flow (1)
- low molecular weight organic acids (1)
- lower mantle (1)
- lunar tides (1)
- lunare Gezeiten (1)
- lysimeter (1)
- ländliche Entwicklung (1)
- macrophytes (1)
- magma assisted continental rifting (1)
- magma degassing (1)
- magmagestütztes kontinentales Rifting (1)
- magmatic (1)
- magmatic-hydrothermal systems (1)
- magmatisch (1)
- magmatisch-hydrothermale Systeme (1)
- magmatism (1)
- magnesite (1)
- magnetic polarisation direction (1)
- magnetische Polarisationsrichtung (1)
- magnetostratigraphy (1)
- magnetotelluric (1)
- manaderos de petróleo (1)
- mantle (1)
- marine sediments (1)
- marine terrace (1)
- marine terraces (1)
- mass extinction (1)
- mass wasting (1)
- matríz mineral (1)
- maturity-related biomarkers (1)
- mecanismos de disparo (1)
- mehrfache Stressfaktoren (1)
- melilitite (1)
- melt structure (1)
- menschliche Einflüsse (1)
- methane (1)
- methane hydrate (1)
- micro-CT (1)
- microbial activity (1)
- microbial methane oxidation (1)
- microplate (1)
- microseismicity (1)
- microsructure (1)
- microstructural deformation mechanisms (1)
- microstructures (1)
- middle Miocene (1)
- migration (1)
- mikrobielle Gemeinschaften (1)
- mikrobielle aerobe Methanoxidation (1)
- mine face mapping (1)
- mineral composition (1)
- mineral matrix (1)
- mineral reaction (1)
- mineral weathering reactions (1)
- mineralische Matrix (1)
- mitigation (1)
- mittleres Miozän (1)
- mixture models (1)
- modelling error sources (1)
- molecular biomarkers (1)
- molekulare Biomarker (1)
- molybdenum (1)
- monazite (1)
- mountain hydrology (1)
- mountain rivers (1)
- multi-equilibrium thermobarometry (1)
- multi-hazard (1)
- multi-proxy approach (1)
- multi-stage exhumation (1)
- multiple stress factors (1)
- multiscale network (1)
- multivariate Statistik (1)
- multivariate statistics (1)
- muscovite (1)
- music information retrieval (1)
- n-alkane (1)
- n-alkanes (1)
- nachaltige Städteentwicklung (1)
- nachhaltige Entwicklung (1)
- nanoscale zero-valent iron (nZVI) (1)
- natural dams (1)
- natural hazard (1)
- natural risks (1)
- natürlichen Ölaustritten (1)
- near-vertical seismic reflection (1)
- neogene (1)
- neon (1)
- neutron field (1)
- neutrons (1)
- next generation sequencing (1)
- nicht-monetäre Bewertung (1)
- nichtisothermer Mehrphasenfluss (1)
- noble gas (1)
- noble gas isotopes (1)
- noise reduction (1)
- non-destructive testing (1)
- non-isothermal multiphase flow (1)
- non-monetary valuation (1)
- normal faulting (1)
- northern Andes (1)
- northern high latitudes (1)
- nuclear waste disposal (1)
- numerical (1)
- numerical model (1)
- numerical models (1)
- numerisch (1)
- numerische Modelle (1)
- numerische Strömungsmechanik (1)
- nutrient emissions (1)
- nutrient retention (1)
- nutrients (1)
- nördliche Anden (1)
- nördliche hohe Breitengrade (1)
- oberflächennahe Geophysík (1)
- object based image analysis (1)
- objektbasierte Bildanalyse (1)
- observational seismology (1)
- occurrence rate (1)
- ocean color remote sensing (1)
- oceanic crust (1)
- offene Daten (1)
- offener Tagebau (1)
- oil seeps (1)
- open data (1)
- open pit mining (1)
- optical properties (1)
- optimal array configuration (1)
- optimale Array-Konfiguration (1)
- optische Eigenschaften (1)
- ore (1)
- ore deposit (1)
- organic matter (1)
- organischer Kohlenstoff (1)
- organisches Material (1)
- organofacies (1)
- orogenic evolution (1)
- ostafrikanisches Riftsystem (1)
- outburst floods (1)
- oxygen (1)
- oxygen and carbon stable isotopes (1)
- oxygen isotopes (1)
- ozeanische Kruste (1)
- pH (1)
- palaeoclimatology (1)
- palaeointensity (1)
- palaeolimnology (1)
- palaeomagnetism (1)
- paleo-lake Mweru (1)
- paleo-strain calculation (1)
- paleo-topography (1)
- paleoaltimetry (1)
- paleofloods (1)
- paleogeography (1)
- paleohydrology (1)
- paleolimnology (1)
- paleosecular variations (1)
- panafrican orogeny (1)
- panafrikanische Orogenese (1)
- parallel seismic (1)
- participatory mapping (1)
- particle swarm optimisation (1)
- passive Seismik (1)
- passive seismic (1)
- pattern recognition (1)
- periglacial landscape evolution (1)
- periglacial landscapes (1)
- periglaziale Landschaften (1)
- periglaziale Landschaftsentwicklung (1)
- permafrost degradation (1)
- permafrost landscapes (1)
- permafrost sediments (1)
- permafrost thaw disturbances (1)
- permanent deformation (1)
- permanente Verformung (1)
- permeability (1)
- permeability evolution (1)
- petrothermal systems (1)
- petrothermale Systeme (1)
- petrothermales System (EGS) (1)
- photogrammetry (1)
- phytoplankton distribution (1)
- pile (1)
- plant waxes (1)
- plant-habitat interactions (1)
- plate boundary friction (1)
- plate motions (1)
- plateau uplift (1)
- plum (1)
- plume-ridge interaction (1)
- plötzliche stratosphärische Erwärmungsereignisse (1)
- polar ice (1)
- polares Eis (1)
- polarimetric decompositions (1)
- polarimetrische Dekompositionen (1)
- pollen (1)
- polymictic lakes (1)
- polymiktische Seen (1)
- polynya (1)
- porphyry copper deposit (1)
- precipitation (1)
- precision horticulture (1)
- pressure solution (1)
- probabilistic approach (1)
- probabilistischer Ansatz (1)
- process identification (1)
- psychology (1)
- quantitative data (1)
- quartäre Geochronologie (1)
- quaternary (1)
- radiación y propiedades químicas (1)
- radial flow (1)
- radiale Strömung (1)
- radiation and chemical properties (1)
- radiocarbon (1)
- radiocarbon age dating (1)
- radiogene Wärmeproduktion (1)
- radiogenic heat production (1)
- radiogenic isotopes (1)
- radiolyse (1)
- radiolysis (1)
- radiólisis (1)
- railway infrastructure (1)
- rainstorm (1)
- rapid earthquake impact assessment (1)
- rare earth elements (1)
- rate-state friction (1)
- reaction path modelling (1)
- reactive transport groundwater model (1)
- reactive transport simulation (1)
- reaktive Transportsimulation (1)
- reaktives Grundwassermodell (1)
- reef (1)
- reflection seismics (1)
- reflection seismology (1)
- regionale Hydrologie (1)
- regionales Klimamodell (1)
- regression analysis (1)
- regularization (1)
- residential buildings (1)
- resources (1)
- response spectra (1)
- retrogressive thaw slump (1)
- retrogressiven Auftaurutschungen (1)
- rheology (1)
- rhizosphere (1)
- ridge subduction (1)
- ridge-collision (1)
- rift (1)
- rift segments interaction (1)
- rifting (1)
- ring-fault (1)
- riparian zone (1)
- risk analysis (1)
- risk communication (1)
- risk model chain (1)
- rivers (1)
- rock fracture (1)
- rock glaciers (1)
- rock mechanics (1)
- rock-water interaction (1)
- rockmagnetism (1)
- rockslide (1)
- roughness (1)
- runoff (1)
- rural development (1)
- russische Arktis (1)
- räumlich explizit (1)
- räumliche Aggregation (1)
- räumliche Analyse (1)
- räumliche Kalibrierung (1)
- räumliche Variabilität (1)
- saisonale Arbeitsmigration (1)
- saline Seen (1)
- saline lakes (1)
- salt rock (1)
- sandstones (1)
- saprolite (1)
- satellite images (1)
- savanna ecology (1)
- scale (1)
- scattered phases (1)
- scatterer location (1)
- schnelle Einschätzung von Erdbebenauswirkungen (1)
- seasonal labor migration (1)
- sedaDNA (1)
- sediment fingerprinting (1)
- sediment source fingerprinting (1)
- sediment thickness (1)
- sediment transport (1)
- sediment transport modelling (1)
- sediment trap (1)
- sediment volume (1)
- sediment-routing system (1)
- sedimentary basin (1)
- sedimentary dynamics (1)
- sedimentary facies (1)
- sedimentary organic matter (1)
- sedimentary record (1)
- sedimentology (1)
- sediments (1)
- sedimentäre alte DNA (1)
- seismic (1)
- seismic array (1)
- seismic attenuation (1)
- seismic attributes (1)
- seismic cycle modeling (1)
- seismic event localization (1)
- seismic imaging (1)
- seismic interferometry (1)
- seismic interpretation (1)
- seismic sequence stratigraphy (1)
- seismic signal processing (1)
- seismic source inversion (1)
- seismic source-time function estimation (1)
- seismic velocities (1)
- seismic velocity (1)
- seismicity and tectonics (1)
- seismicity modelling (1)
- seismics (1)
- seismische Attribute (1)
- seismische Dämpfung (1)
- seismische Ereignislokalisierung (1)
- seismische Geschwindigkeit (1)
- seismische Geschwindigkeiten (1)
- seismische Interpretation (1)
- seismische Rauschen (1)
- seismische Sequenzstratigraphie (1)
- seismische Stapelungs-Methode (1)
- seismische Tomographie (1)
- seismisches Array (1)
- seismogene Kopplungszone (1)
- seismogenic coupling zone (1)
- seismology ; PKP caustic point B ; diffraction of PKP core phases ; decay spectra of waveform data ; transition zone to the earth's inner core ; Germa (1)
- seismotectonic (1)
- seismotectonics (1)
- seltene Erden (1)
- sensors (1)
- shale strength (1)
- shallow geophysics (1)
- shallow-water carbonates (1)
- shear zones (1)
- shorelines (1)
- signal formation (1)
- signal propagation (1)
- silicate melt (1)
- silicate melts (1)
- silicate weathering (1)
- silikatische Schmelzen (1)
- simulation on a day-to-day-basis (1)
- simulações numéricas (1)
- sistemas magmático-hidrotermais (1)
- skarn (1)
- snow (1)
- snow avalanches (1)
- soil constituents mapping (1)
- soil heterogeneity (1)
- soil hydrology (1)
- soil moisture patterns (1)
- soil water content (1)
- sorption (1)
- source array optimal design (1)
- source duration (1)
- source inversion (1)
- source model (1)
- source parameters (1)
- southern Turkey (1)
- spatial aggregation (1)
- spatial analyses (1)
- spatial calibration (1)
- spatial variability (1)
- spatially explicit (1)
- spectral analysis (1)
- spectral unmixing (1)
- spectro-directional (1)
- spektro-direktional (1)
- spherical harmonics (1)
- spread F (1)
- spröde Deformation (1)
- spätes Holozän (1)
- stabilen Isotopen (1)
- stable isotope (1)
- stalagmites (1)
- starker Konvektion (1)
- state-transition models (1)
- statistical seismology (1)
- statistische Seismologie (1)
- stochastic algorithms (1)
- strain localization (1)
- stratigraphic forward modelling (1)
- stratigraphische Vorwärtsmodellierung (1)
- streambed morphology (1)
- strength (1)
- stress (1)
- stress changes (1)
- stress measurement (1)
- stress modeling (1)
- stress partitioning (1)
- stress pattern (1)
- strike-slip (1)
- strike-slip faults (1)
- structural inheritance (1)
- structural modelling (1)
- strukturelle Kontrolle (1)
- subduction earthquake (1)
- subduction-accretionary complexes (1)
- subduktions-akkretions Komplexe (1)
- subsidence history (1)
- subsurface (1)
- sudden stratospheric warming (1)
- sulphate reduction (1)
- superconducting gravimeter (SG) (1)
- surface (1)
- surface evolution (1)
- surface exposure dating (1)
- surface urban heat island effect (1)
- susceptibility of the European electricity sector (1)
- suspended sediments (1)
- sustainable development (1)
- sustainable urban development (1)
- swarm mission (1)
- syntaxis (1)
- synthetic array beam power (1)
- synthetic sandstone (1)
- synthetic seismograms (1)
- synthetische Array-Strahlleistung (1)
- synthetische Seismogramme (1)
- tagesaktuelle Simulation (1)
- tectonic stress (1)
- tectonic uplift (1)
- tektonische Hebung (1)
- tektonische Spannungen (1)
- temperature (1)
- temperature field analysis (1)
- temporal gravity variations (1)
- tensile Anteile (1)
- tensile earthquakes (1)
- terrigenous input (1)
- thermal conductivity (1)
- thermal field (1)
- thermal model (1)
- thermal modelling (1)
- thermisches Feld (1)
- thermisches Modell (1)
- thermo-mechanical modeling (1)
- thermo-mechanics (1)
- thermo-mechanische Modellierung (1)
- thermobarometry (1)
- thermochemical mantle convection (1)
- thermochemischer Mantelkonvektion (1)
- thermodynamic and kinetic properties (1)
- thermodynamische und kinetische Eigenschaften (1)
- thermoerosion (1)
- thermokarst processes (1)
- tiefer Kohlenstoff (1)
- tiefes Lernen (1)
- time dependent (1)
- time scale (1)
- time series (1)
- time-series analysis (1)
- tin (1)
- tomography (1)
- topography (1)
- tourmaline (1)
- trace element partitioning (1)
- transform fault (1)
- transformation of hydrological signals (1)
- transient earthquake patterns (1)
- transiente Erdbebenmuster (1)
- transnational migration (1)
- transnationale Migration (1)
- transnationalism (1)
- tree water status (1)
- trend analyses (1)
- triaxial deformation experiments (1)
- triaxiale Deformationsexperimente (1)
- trigger mechanism (1)
- tsunami early warning (1)
- tsunami risk (1)
- tungsten-tin deposits (1)
- turbidity modelling (1)
- turmalina (1)
- typhoons (1)
- ultrasound (1)
- uncertainties (1)
- uncertainty (1)
- uncertainty analysis (1)
- uncertainty estimation (1)
- unconventional shale (1)
- underground coal gasification (1)
- unkonventionelle Schiefer (1)
- unterer Mantel (1)
- upper mantle density heterogeneities (1)
- upper mantle viscosity structure (1)
- uranium (1)
- uranium-lead-dating (1)
- urban efficiency (1)
- urban form (1)
- urban heat island effect (1)
- variability (1)
- varve (1)
- vegetation cover (1)
- velocity structure (1)
- verbesserte geothermische Systeme (1)
- verstärkende Seen (1)
- vertical coupling (1)
- vertikale Kuppelung (1)
- vertikaler Fluss (1)
- video analysis (1)
- virtual active seismic (1)
- virtuelle aktive Seismik (1)
- volcanic glass (1)
- volcanic hazard assessment (1)
- volcanic hydrothermal systems (1)
- volcanic seismology (1)
- volcaniclastics (1)
- volcanism (1)
- volcano deformation (1)
- volcano remote sensing (1)
- volcano seismology (1)
- volcanology (1)
- vulkanische Entgasungs-und Hydrothermalsysteme (1)
- vulkanische Entgasungssysteme (1)
- vulkanischer Gläser (1)
- water monitoring (1)
- water quality (1)
- water quality modelling (1)
- water rock interactions (1)
- water storage changes (1)
- water vapour (1)
- wave scattering and diffraction (1)
- wave velocities (1)
- weather pattern (1)
- weather patterns (1)
- weathering feedback (1)
- wind gusts (1)
- winderosion (1)
- wood compost (1)
- x-ray absorption spectroscopy (1)
- zeitabhängige Gravitationsvariation (1)
- zentral-östliches Beringia (1)
- zentrale Anden (1)
- zentralen Anden (1)
- zinc (1)
- zirkulare Statistik (1)
- Ästuar (1)
- Ökohydrologie (1)
- Östliches Karoo-Becken (1)
- Überschwemmungen (1)
- Überschwemmungsflächen (1)
- Überwachung (1)
- Þeistareykir Iceland (1)
- Þeistareykir Island (1)
- äquatorialen Plasma-Verarmungen (1)
- äquatorialer Elektrojet (1)
- ökohydrologische Modellierung (1)
- ökologische Modellierung (1)
- ökonomische Auswirkungen (1)
- östlich-südzentrale Anden (1)
- östliche Kordillere (1)
- δ18O and δ13C stabile Isotope (1)
- δ18O and δ13C stable isotopes (1)
Institute
- Institut für Geowissenschaften (325) (remove)
Die vorliegende Arbeit basiert auf Forschungen in den Jahren 2007-2009. Sie betrachtet die saisonale Arbeitsmigration aus der polnischen Region Konin, wo die Arbeitsmigration aus ökonomischen Gründen, wie auch in ähnlich strukturierten Gebieten Polens, eine lange Tradition hat, die bis ins 19. Jahrhundert zurückgeht. Sie wird die saisonale Migration ins Ausland mit den ökonomischen, sozialen und räumlichen Auswirkungen aus der Perspektive des Einzelnen und seiner unmittelbaren Umgebung, aber auch der Gesellschaft und Herkunftsgebiet der Migranten betrachtet.
Entsprechend der Zielstellung wurden zunächst verschiedene Varianten der Kompostierung von Holzsubstanz getestet, um eine optimale Technologie, die auch für Entwicklungsländer realisierbar ist, herauszufinden. Hierzu sind in Pflanztöpfe Holzspäne (Woodchips) von zwei verschieden Holzarten (Laub- und Nadelholz) gefüllt und mit verschiedenen natürlichen Stickstoffquellen gemischt worden. Diese Ansätze wurden regelmäßig mit Kompostwasser appliziert. Nach vier Wochen sind zwei verschiedene Wurmarten (Dendrobaena veneta und Eisenia fetida) hinzugegeben worden. Die Feuchthaltung erfolgte ab diesem Zeitpunkt durch Frischwasser. Die qualitativ beste Versuchsvariante ist im nächsten Schritt mit weiteren natürlichen Stickstoffquellen, die in Entwicklungsländern zur Verfügung gestellt werden könnten, getestet worden. Von allen Kompostvarianten sind im Labor eine Vielzahl von bodenphysikalischen (z.B. Dichte, Wasserhaltekapazität) und bodenchemischen Zustandsgrößen (z.B. Elektrische Leitfähigkeit, Totalgehalte biophiler Elemente, Bodenreaktion, organische Substanzgehalte, Kationenaustauschkapazität) bestimmt worden. Die Wiederum qualitativ beste Mischung ist in einer weiteren Versuchsreihe in verschiedenen Mengenverhältnissen mit tertiärerem Abraumsand des Braunkohlebergbaus gemischt worden. In diese Versuchsmischungen wurde die Grasmischung RSM 7.2.1 eingesät und regelmäßig bewässert sowie die Wuchshöhe gemessen. Nach 42 Tagen wurden das Gras geerntet und die biometrischen Parameter, die Nährstoffgehalte (pflanzenverfügbare Fraktionen), die Bodenreaktion, die effektive bzw. potentielle Kationenaustauschkapazität sowie die Pufferkapazitäten der Mischsubstrate bestimmt. Die nächsten Versuchsvarianten sind als Feldversuche in der Niederlausitz durchgeführt worden. Für ihre Realisierung wurde als weiterer Zuschlagsstoff Arkadolith® zugemischt. Die Plotflächen sind sowohl auf Abraumsanden des Tertiärs als auch Quartärs angelegt worden. In jeweils eine Subvariante ist RSM 7.2.1, in die andere eine autochthone Grasmischung eingesät worden. Diese Experimente wurden nach 6 Monaten beendet, die Bestimmung aller Parameter erfolgte in gleicher Weise wie bei den Gewächshausversuchen. Auf Basis aller Versuchsreihen konnten die besten Kompostqualitäten und ihre optimalen Herstellungsvarianten ermittelt werden. Eine weitere Aufgabe war es zu untersuchen, wie im Vergleich zur Verbrennung von Holzmasse die CO2-Emission in die Atmosphäre durch Holzkompostierung verringert werden kann. Hierzu wurde während der verschiedenen Kompostierungsvarianten die CO2-Freisetzung gemessen. Im Vergleich dazu ist jeweils die gleiche Masse an Holzsubstanz verbrannt worden. Die Ergebnisse zeigten, dass im Vergleich zu der thermischen Verwertung von Holsubstanz die CO2-Emission bis zu 50 % verringert werden kann. Dem Boden kann darüber hinaus energiereiche organische Substanz zugeführt werden, die eine Entwicklung der Bodenorganismen ermöglicht. Ein weiteres Experiment zielte darauf ab, die Stabilität der Holzkomposte zu bestimmen. Darüber hinaus sollte untersucht werden, ob durch die Zufuhr von pyrogenem Kohlenstoff eine Vergrößerung der Stabilität zu erreichen ist. Diese Untersuchungen wurden mit Hilfe der Thermogravimetrie vorgenommen. Alle wichtigen Kompostierungsvarianten sind sowohl mit verschiedenen Zusatzmengen als auch ohne Zusatz von pyrogenem Kohlenstoff vermessen worden. Als Vergleichssubstanz diente der Oberboden eines Niedermoorgleys, der naturgemäß einen relativ hohen Anteil an organischer Substanz aufweist. Die Ergebnisse zeigten, dass im Bereich niedriger Temperaturen die Wasserbindung im Naturboden fester ist. In der Fraktion der oxidierbaren organischen Substanz, im mittleren Temperaturbereich gemessen, ist die natürliche Bodensubstanz ebenfalls stabiler, was auf eine intensivere Bindung zwischen den organischen und anorganischen Bestandteilen, also auf stabilere organisch-mineralische Komplexe, schlussfolgern lässt. Im Bereich höherer Temperaturen (T> 550° C) waren im Naturboden keine nennenswerten organischen Bestandteile mehr nachweisbar. Hingegen wiesen die Kompostvarianten einen hohen Anteil stabiler Fraktionen, vor allem aromatische Verbindungen, auf. Diese Aussagen erscheinen vor allem für die praktische Anwendung der Holzkomposte in Hinblick auf ihre Langzeitwirkung bedeutsam. Der Zusatz von pyrogenem Kohlenstoff zeigte keine zusätzliche Stabilisierungswirkung.
Among the multitude of geomorphological processes, aeolian shaping processes are of special character, Pedogenic dust is one of the most important sources of atmospheric aerosols and therefore regarded as a key player for atmospheric processes. Soil dust emissions, being complex in composition and properties, influence atmospheric processes and air quality and has impacts on other ecosystems. In this because even though their immediate impact can be considered low (exceptions exist), their constant and large-scale force makes them a powerful player in the earth system. dissertation, we unravel a novel scientific understanding of this complex system based on a holistic dataset acquired during a series of field experiments on arable land in La Pampa, Argentina. The field experiments as well as the generated data provide information about topography, various soil parameters, the atmospheric dynamics in the very lower atmosphere (4m height) as well as measurements regarding aeolian particle movement across a wide range of particle size classes between 0.2μm up to the coarse sand.
The investigations focus on three topics: (a) the effects of low-scale landscape structures on aeolian transport processes of the coarse particle fraction, (b) the horizontal and vertical fluxes of the very fine particles and (c) the impact of wind gusts on particle emissions.
Among other considerations presented in this thesis, it could in particular be shown, that even though the small-scale topology does have a clear impact on erosion and deposition patterns, also physical soil parameters need to be taken into account for a robust statistical modelling of the latter. Furthermore, specifically the vertical fluxes of particulate matter have different characteristics for the particle size classes. Finally, a novel statistical measure was introduced to quantify the impact of wind gusts on the particle uptake and its application on the provided data set. The aforementioned measure shows significantly increased particle concentrations during points in time defined as gust event.
With its holistic approach, this thesis further contributes to the fundamental understanding of how atmosphere and pedosphere are intertwined and affect each other.
In sedimentary basins, rock thermal conductivity can vary both laterally and vertically, thus altering the basin’s thermal structure locally and regionally. Knowledge of the thermal conductivity of geological formations and its spatial variations is essential, not only for quantifying basin evolution and hydrocarbon maturation processes, but also for understanding geothermal conditions in a geological setting. In conjunction with the temperature gradient, thermal conductivity represents the basic input parameter for the determination of the heat-flow density; which, in turn, is applied as a major input parameter in thermal modeling at different scales. Drill-core samples, which are necessary to determine thermal properties by laboratory measurements, are rarely available and often limited to previously explored reservoir formations. Thus, thermal conductivities of Mesozoic rocks in the North German Basin (NGB) are largely unknown. In contrast, geophysical borehole measurements are often available for the entire drilled sequence. Therefore, prediction equations to determine thermal conductivity based on well-log data are desirable. In this study rock thermal conductivity was investigated on different scales by (1) providing thermal-conductivity measurements on Mesozoic rocks, (2) evaluating and improving commonly applied mixing models which were used to estimate matrix and pore-filled rock thermal conductivities, and (3) developing new well-log based equations to predict thermal conductivity in boreholes without core control. Laboratory measurements are performed on sedimentary rock of major geothermal reservoirs in the Northeast German Basin (NEGB) (Aalenian, Rhaethian-Liassic, Stuttgart Fm., and Middle Buntsandstein). Samples are obtained from eight deep geothermal wells that approach depths of up to 2,500 m. Bulk thermal conductivities of Mesozoic sandstones range between 2.1 and 3.9 W/(m∙K), while matrix thermal conductivity ranges between 3.4 and 7.4 W/(m∙K). Local heat flow for the Stralsund location averages 76 mW/m², which is in good agreement to values reported previously for the NEGB. For the first time, in-situ bulk thermal conductivity is indirectly calculated for entire borehole profiles in the NEGB using the determined surface heat flow and measured temperature data. Average bulk thermal conductivity, derived for geological formations within the Mesozoic section, ranges between 1.5 and 3.1 W/(m∙K). The measurement of both dry- and water-saturated thermal conductivities allow further evaluation of different two-component mixing models which are often applied in geothermal calculations (e.g., arithmetic mean, geometric mean, harmonic mean, Hashin-Shtrikman mean, and effective-medium theory mean). It is found that the geometric-mean model shows the best correlation between calculated and measured bulk thermal conductivity. However, by applying new model-dependent correction, equations the quality of fit could be significantly improved and the error diffusion of each model reduced. The ‘corrected’ geometric mean provides the most satisfying results and constitutes a universally applicable model for sedimentary rocks. Furthermore, lithotype-specific and model-independent conversion equations are developed permitting a calculation of water-saturated thermal conductivity from dry-measured thermal conductivity and porosity within an error range of 5 to 10%. The limited availability of core samples and the expensive core-based laboratory measurements make it worthwhile to use petrophysical well logs to determine thermal conductivity for sedimentary rocks. The approach followed in this study is based on the detailed analyses of the relationships between thermal conductivity of rock-forming minerals, which are most abundant in sedimentary rocks, and the properties measured by standard logging tools. By using multivariate statistics separately for clastic, carbonate and evaporite rocks, the findings from these analyses allow the development of prediction equations from large artificial data sets that predict matrix thermal conductivity within an error of 4 to 11%. These equations are validated successfully on a comprehensive subsurface data set from the NGB. In comparison to the application of earlier published approaches formation-dependent developed for certain areas, the new developed equations show a significant error reduction of up to 50%. These results are used to infer rock thermal conductivity for entire borehole profiles. By inversion of corrected in-situ thermal-conductivity profiles, temperature profiles are calculated and compared to measured high-precision temperature logs. The resulting uncertainty in temperature prediction averages < 5%, which reveals the excellent temperature prediction capabilities using the presented approach. In conclusion, data and methods are provided to achieve a much more detailed parameterization of thermal models.
Large-scale volcanic deformation recently detected by radar interferometry (InSAR) provides new information and thus new scientific challenges for understanding volcano-tectonic activity and magmatic systems. The destabilization of such a system at depth noticeably affects the surrounding environment through magma injection, ground displacement and volcanic eruptions. To determine the spatiotemporal evolution of the Lazufre volcanic area located in the central Andes, we combined short-term ground displacement acquired by InSAR with long-term geological observations. Ground displacement was first detected using InSAR in 1997. By 2008, this displacement affected 1800 km2 of the surface, an area comparable in size to the deformation observed at caldera systems. The original displacement was followed in 2000 by a second, small-scale, neighbouring deformation located on the Lastarria volcano. We performed a detailed analysis of the volcanic structures at Lazufre and found relationships with the volcano deformations observed with InSAR. We infer that these observations are both likely to be the surface expression of a long-lived magmatic system evolving at depth. It is not yet clear whether Lazufre may trigger larger unrest or volcanic eruptions; however, the second deformation detected at Lastarria and the clear increase of the large-scale deformation rate make this an area of particular interest for closer continuous monitoring.
Volcanoes are one of the Earth’s most dynamic zones and responsible for many changes in our planet. Volcano seismology aims to provide an understanding of the physical processes in volcanic systems and anticipate the style and timing of eruptions by analyzing the seismic records. Volcanic tremor signals are usually observed in the seismic records before or during volcanic eruptions. Their analysis contributes to evaluate the evolving volcanic activity and potentially predict eruptions. Years of continuous seismic monitoring now provide useful information for operational eruption forecasting. The continuously growing amount of seismic recordings, however, poses a challenge for analysis, information extraction, and interpretation, to support timely decision making during volcanic crises. Furthermore, the complexity of eruption processes and precursory activities makes the analysis challenging.
A challenge in studying seismic signals of volcanic origin is the coexistence of transient signal swarms and long-lasting volcanic tremor signals. Separating transient events from volcanic tremors can, therefore, contribute to improving our understanding of the underlying physical processes. Some similar issues (data reduction, source separation, extraction, and classification) are addressed in the context of music information retrieval (MIR). The signal characteristics of acoustic and seismic recordings comprise a number of similarities. This thesis is going beyond classical signal analysis techniques usually employed in seismology by exploiting similarities of seismic and acoustic signals and building the information retrieval strategy on the expertise developed in the field of MIR.
First, inspired by the idea of harmonic–percussive separation (HPS) in musical signal processing, I have developed a method to extract harmonic volcanic tremor signals and to detect transient events from seismic recordings. This provides a clean tremor signal suitable for tremor investigation along with a characteristic function suitable for earthquake detection. Second, using HPS algorithms, I have developed a noise reduction technique for seismic signals. This method is especially useful for denoising ocean bottom seismometers, which are highly contaminated by noise. The advantage of this method compared to other denoising techniques is that it doesn’t introduce distortion to the broadband earthquake waveforms, which makes it reliable for different applications in passive seismological analysis. Third, to address the challenge of extracting information from high-dimensional data and investigating the complex eruptive phases, I have developed an advanced machine learning model that results in a comprehensive signal processing scheme for volcanic tremors. Using this method seismic signatures of major eruptive phases can be automatically detected. This helps to provide a chronology of the volcanic system. Also, this model is capable to detect weak precursory volcanic tremors prior to the eruption, which could be used as an indicator of imminent eruptive activity. The extracted patterns of seismicity and their temporal variations finally provide an explanation for the transition mechanism between eruptive phases.
The main intention of the PhD project was to create a varve chronology for the Suigetsu Varves 2006' (SG06) composite profile from Lake Suigetsu (Japan) by thin section microscopy. The chronology was not only to provide an age-scale for the various palaeo-environmental proxies analysed within the SG06 project, but also and foremost to contribute, in combination with the SG06 14C chronology, to the international atmospheric radiocarbon calibration curve (IntCal). The SG06 14C data are based on terrestrial leaf fossils and therefore record atmospheric 14C values directly, avoiding the corrections necessary for the reservoir ages of the marine datasets, which are currently used beyond the tree-ring limit in the IntCal09 dataset (Reimer et al., 2009). The SG06 project is a follow up of the SG93 project (Kitagawa & van der Plicht, 2000), which aimed to produce an atmospheric calibration dataset, too, but suffered from incomplete core recovery and varve count uncertainties. For the SG06 project the complete Lake Suigetsu sediment sequence was recovered continuously, leaving the task to produce an improved varve count. Varve counting was carried out using a dual method approach utilizing thin section microscopy and micro X-Ray Fluorescence (µXRF). The latter was carried out by Dr. Michael Marshall in cooperation with the PhD candidate. The varve count covers 19 m of composite core, which corresponds to the time frame from ≈10 to ≈40 kyr BP. The count result showed that seasonal layers did not form in every year. Hence, the varve counts from either method were incomplete. This rather common problem in varve counting is usually solved by manual varve interpolation. But manual interpolation often suffers from subjectivity. Furthermore, sedimentation rate estimates (which are the basis for interpolation) are generally derived from neighbouring, well varved intervals. This assumes that the sedimentation rates in neighbouring intervals are identical to those in the incompletely varved section, which is not necessarily true. To overcome these problems a novel interpolation method was devised. It is computer based and automated (i.e. avoids subjectivity and ensures reproducibility) and derives the sedimentation rate estimate directly from the incompletely varved interval by statistically analysing distances between successive seasonal layers. Therefore, the interpolation approach is also suitable for sediments which do not contain well varved intervals. Another benefit of the novel method is that it provides objective interpolation error estimates. Interpolation results from the two counting methods were combined and the resulting chronology compared to the 14C chronology from Lake Suigetsu, calibrated with the tree-ring derived section of IntCal09 (which is considered accurate). The varve and 14C chronology showed a high degree of similarity, demonstrating that the novel interpolation method produces reliable results. In order to constrain the uncertainties of the varve chronology, especially the cumulative error estimates, U-Th dated speleothem data were used by linking the low frequency 14C signal of Lake Suigetsu and the speleothems, increasing the accuracy and precision of the Suigetsu calibration dataset. The resulting chronology also represents the age-scale for the various palaeo-environmental proxies analysed in the SG06 project. One proxy analysed within the PhD project was the distribution of event layers, which are often representatives of past floods or earthquakes. A detailed microfacies analysis revealed three different types of event layers, two of which are described here for the first time for the Suigetsu sediment. The types are: matrix supported layers produced as result of subaqueous slope failures, turbidites produced as result of landslides and turbidites produced as result of flood events. The former two are likely to have been triggered by earthquakes. The vast majority of event layers was related to floods (362 out of 369), which allowed the construction of a respective chronology for the last 40 kyr. Flood frequencies were highly variable, reaching their greatest values during the global sea level low-stand of the Glacial, their lowest values during Heinrich Event 1. Typhoons affecting the region represent the most likely control on the flood frequency, especially during the Glacial. However, also local, non-climatic controls are suggested by the data. In summary, the work presented here expands and revises knowledge on the Lake Suigetsu sediment and enabls the construction of a far more precise varve chronology. The 14C calibration dataset is the first such derived from lacustrine sediments to be included into the (next) IntCal dataset. References: Kitagawa & van der Plicht, 2000, Radiocarbon, Vol 42(3), 370-381 Reimer et al., 2009, Radiocarbon, Vol 51(4), 1111-1150
Rheology describes the flow of matter under the influence of stress, and - related to solids- it investigates how solids subjected to stresses deform. As the deformation of the Earth’s outer layers, the lithosphere and the crust, is a major focus of rheological studies, rheology in the geosciences describes how strain evolves in rocks of variable composition and temperature under tectonic stresses. It is here where deformation processes shape the form of ocean basins and mountain belts that ultimately result from the complex interplay between lithospheric plate motion and the susceptibility of rocks to the influence of plate-tectonic forces. A rigorous study of the strength of the lithosphere and deformation phenomena thus requires in-depth studies of the rheological characteristics of the involved materials and the temporal framework of deformation processes.
This dissertation aims at analyzing the influence of the physical configuration of the lithosphere on the present-day thermal field and the overall rheological characteristics of the lithosphere to better understand variable expressions in the formation of passive continental margins and the behavior of strike-slip fault zones. The main methodological approach chosen is to estimate the present-day thermal field and the strength of the lithosphere by 3-D numerical modeling. The distribution of rock properties is provided by 3-D structural models, which are used as the basis for the thermal and rheological modeling. The structural models are based on geophysical and geological data integration, additionally constrained by 3-D density modeling. More specifically, to decipher the thermal and rheological characteristics of the lithosphere in both oceanic and continental domains, sedimentary basins in the Sea of Marmara (continental transform setting), the SW African passive margin (old oceanic crust), and the Norwegian passive margin (young oceanic crust) were selected for this study.
The Sea of Marmara, in northwestern Turkey, is located where the dextral North Anatolian Fault zone (NAFZ) accommodates the westward escape of the Anatolian Plate toward the Aegean. Geophysical observations indicate that the crust is heterogeneous beneath the Marmara basin, but a detailed characterization of the lateral crustal heterogeneities is presented for the first time in this study. Here, I use different gravity datasets and the general non-uniqueness in potential field modeling, to propose three possible end-member scenarios of crustal configuration. The models suggest that pronounced gravitational anomalies in the basin originate from significant density heterogeneities within the crust. The rheological modeling reveals that associated variations in lithospheric strength control the mechanical segmentation of the NAFZ. Importantly, a strong crust that is mechanically coupled to the upper mantle spatially correlates with aseismic patches where the fault bends and changes its strike in response to the presence of high-density lower crustal bodies. Between the bends, mechanically weaker crustal domains that are decoupled from the mantle are characterized by creep.
For the passive margins of SW Africa and Norway, two previously published 3-D conductive and lithospheric-scale thermal models were analyzed. These 3-D models differentiate various sedimentary, crustal, and mantle units and integrate different geophysical data, such as seismic observations and the gravity field. Here, the rheological modeling suggests that the present-day lithospheric strength across the oceanic domain is ultimately affected by the age and past thermal and tectonic processes as well as the depth of the thermal lithosphere-asthenosphere boundary, while the configuration of the crystalline crust dominantly controls the rheological behavior of the lithosphere beneath the continental domains of both passive margins.
The thermal and rheological models show that the variations of lithospheric strength are fundamentally influenced by the temperature distribution within the lithosphere. Moreover, as the composition of the lithosphere significantly influences the present-day thermal field, it therefore also affects the rheological characteristics of the lithosphere. Overall my studies add to our understanding of regional tectonic deformation processes and the long-term behavior of sedimentary basins; they confirm other analyses that have pointed out that crustal heterogeneities in the continents result in diverse lithospheric thermal characteristics, which in turn results in higher complexity and variations of rheological behavior compared to oceanic domains with a thinner, more homogeneous crust.
Humankind and their environment need to be protected from the harmful effects of spent nuclear fuel, and therefore disposal in deep geological formations is favoured worldwide. Suitability of potential host rocks is evaluated, among others, by the retention capacity with respect to radionuclides. Safety assessments are based on the quantification of radionuclide migration lengths with numerical simulations as experiments cannot cover the required temporal (1 Ma) and spatial scales (>100 m).
Aim of the present thesis is to assess the migration of uranium, a geochemically complex radionuclide, in the potential host rock Opalinus Clay. Radionuclide migration in clay formations is governed by diffusion due to their low permeability and retarded by sorption. Both processes highly depend on pore water geochemistry and mineralogy that vary between different facies. Diffusion is quantified with the single-component (SC) approach using one diffusion coefficient for all species and the process-based multi-component (MC) option. With this, each species is assigned its own diffusion coefficient and the interaction with the diffuse double layer is taken into account. Sorption is integrated via a bottom-up approach using mechanistic surface complexation models and cation exchange. Therefore, reactive transport simulations are conducted with the geochemical code PHREEQC to quantify uranium migration, i.e. diffusion and sorption, as a function of mineralogical and geochemical heterogeneities on the host rock scale.
Sorption processes are facies dependent. Migration lengths vary between the Opalinus Clay facies by up to 10 m. Thereby, the geochemistry of the pore water, in particular the partial pressure of carbon dioxide (pCO2), is more decisive for the sorption capacity than the amount of clay minerals. Nevertheless, higher clay mineral quantities compensate geochemical variations. Consequently, sorption processes must be quantified as a function of pore water geochemistry in contact with the mineral assemblage.
Uranium diffusion in the Opalinus Clay is facies independent. Speciation is dominated by aqueous ternary complexes of U(VI) with calcium and carbonate. Differences in the migration lengths between SC and MC diffusion are with +/-5 m negligible. Further, the application of the MC approach highly depends on the quality and availability of the underlying data. Therefore, diffusion processes can be adequately quantified with the SC approach using experimentally determined diffusion coefficients.
The hydrogeological system governs pore water geochemistry within the formation rather than the mineralogy. Diffusive exchange with the adjacent aquifers established geochemical gradients over geological time scales that can enhance migration by up to 25 m. Consequently, uranium sorption processes must be quantified following the identified priority: pCO2 > hydrogeology > mineralogy.
The presented research provides a workflow and orientation for other potential disposal sites with similar pore water geochemistry due to the identified mechanisms and dependencies. With a maximum migration length of 70 m, the retention capacity of the Opalinus Clay with respect to uranium is sufficient to fulfill the German legal minimum requirement of a thickness of at least 100 m.
Das Menderes Massiv im Westen der Türkei stellt eine große Kulmination metamorpher Gesteine dar. Das Untersuchungsgebiet ist im Zentralen Menderes Massiv (Ödemis Submassiv) gelegen, das von den beiden aktiven Gräben, dem Gediz Graben im Norden und dem Büyük Menderes Graben im Süden begrenzt wird. Die Untersuchungen der Eklogit Relikte im zentralen Menderes Massiv haben ergeben, dass sich im Menderes Massiv Hochdruckrelikte in unterschiedlichen tektonischen Positionen befinden. Zum einen existieren Eklogit-Blöcke in der obersten Einheit (Selcuk Einheit) des zentralen Menderes Massivs und zum anderen Hochdruck-Relikte in der strukturell mittleren Birgi - Tire Decke. Die Granate der quarzfreien Eklogit-Blöcke weisen große Ähnlichkeiten mit denen der HP/LT Gesteine von Sifnos und Syros auf. Die Entwicklung der Eklogit-Blöcke in der Olistostrom-Einheit lässt sich jedoch nicht mit den Eklogit Relikten in der strukturell mittleren Birgi Tire Decke vergleichen. Für die Eklogit-Relikte in der Birgi Tire Decke wurde eine polymetamorphe Entwicklung mithilfe petrologischer Untersuchungen und chemischen und Pb-Pb Datierungen herausgearbeitet. Die Eklogit Relikte gehören zu einem metamorphen Teilpfad, der durch eine Amphibolitfazies 1 - Hochdruck - Amphibolitfazies 2/Granulitfazies charakterisiert ist. Der Endpunkt dieses Teilpfades ist mit Temperaturen zwischen 700 und 750 °C und Drücken von 1.2 - 1.4 GPa belegt. Für diese Bedingungen konnte ein minimales Alter von 520 Ma durch chemische Datierungen an Monaziten einer Augengneisprobe und Pb-Pb Datierungen an Zirkonen einer Augengneis- und Metagabbroprobe bestimmt werden. Dieser amphibolit/granulitfazieller Endpunkt wird mit den Granitintrusionen des zentralen und südlichen Menderes Massiv korreliert, die in einem Zeitraum zwischen 520 Ma bis 550 Ma stattfanden. Sowohl die Amphibolitfazies 1 als auch das Hochdruckereignis werden der Panafrikanischen Orogenese zugeordnet. Für die Hochdruckbedingungen wurden maximale Temperaturen zwischen 680°C und 720°C und bei einem Druck von 2.2 GPa bestimmt. In den untersuchten Metasedimenten konnte eine prograde metamorphe Entwicklung abgeleitet werden, die amphibolitfazielle Bedingungen von 660°C bei 0.6 GPa erreichte. Das Metamorphosealter dieser Metasedimente konnte mit < 100 Ma mittels chemischer Mikrosondendatierung bestimmt werden. Die in den Metasedimenten herausgearbeiteten Druck- und Temperaturbedingungen wurden ebenfalls in den metabasischen Gesteinen bestimmt. Diese Ergebnisse werden als Krustenstapelung der metabasischen Gesteine, Augengneise und Metasedimente interpretiert, die mit der alpinen Orogenese im Zusammenhang stehen. Durch die Ergebnisse dieser Arbeit lässt sich die Birgi-Tire Decke im zentralen Menderes Massiv genauer charakterisieren. Sie besteht aus Metasedimenten, pelitischen Gneisen, Augengneisen und metabasichen Gesteinen. Die Gneise (pelitische und Augengneise) und die metabasischen Gesteine stellen panafrikanische Relikte dar, die einen amphibolit- eklogit- amphibolit/granulitfaziellen Metamorphosepfad gespeichert haben. Die amphibolit- bis granulitfazielle Metamorphose hängt mit den Granitintrusionen zusammen und fand in einem Zeitraum zwischen 520 - 550 Ma statt. Große Teile der Metasedimente der Birgi Tire Decke haben jedoch nur eine alpine metamorphe Entwicklung durchlaufen, wo sie unter amphibolitfazielle Bedingungen Krustentiefen erreichten, bei denen sie mit den panafrikanischen Relikten zusammen gestapelt wurden und eine gemeinsame Exhumierung erfahren haben.
The climate is a complex dynamical system involving interactions and feedbacks among different processes at multiple temporal and spatial scales. Although numerous studies have attempted to understand the climate system, nonetheless, the studies investigating the multiscale characteristics of the climate are scarce. Further, the present set of techniques are limited in their ability to unravel the multi-scale variability of the climate system. It is completely plausible that extreme events and abrupt transitions, which are of great interest to climate community, are resultant of interactions among processes operating at multi-scale. For instance, storms, weather patterns, seasonal irregularities such as El Niño, floods and droughts, and decades-long climate variations can be better understood and even predicted by quantifying their multi-scale dynamics. This makes a strong argument to unravel the interaction and patterns of climatic processes at different scales. With this background, the thesis aims at developing measures to understand and quantify multi-scale interactions within the climate system.
In the first part of the thesis, I proposed two new methods, viz, multi-scale event synchronization (MSES) and wavelet multi-scale correlation (WMC) to capture the scale-specific features present in the climatic processes. The proposed methods were tested on various synthetic and real-world time series in order to check their applicability and replicability. The results indicate that both methods (WMC and MSES) are able to capture scale-specific associations that exist between processes at different time scales in a more detailed manner as compared to the traditional single scale counterparts.
In the second part of the thesis, the proposed multi-scale similarity measures were used in constructing climate networks to investigate the evolution of spatial connections within climatic processes at multiple timescales. The proposed methods WMC and MSES, together with complex network were applied to two different datasets.
In the first application, climate networks based on WMC were constructed for the univariate global sea surface temperature (SST) data to identify and visualize the SSTs patterns that develop very similarly over time and distinguish them from those that have long-range teleconnections to other ocean regions. Further investigations of climate networks on different timescales revealed (i) various high variability and co-variability regions, and (ii) short and long-range teleconnection regions with varying spatial distance. The outcomes of the study not only re-confirmed the existing knowledge on the link between SST patterns like El Niño Southern Oscillation and the Pacific Decadal Oscillation, but also suggested new insights into the characteristics and origins of long-range teleconnections.
In the second application, I used the developed non-linear MSES similarity measure to quantify the multivariate teleconnections between extreme Indian precipitation and climatic patterns with the highest relevance for Indian sub-continent. The results confirmed significant non-linear influences that were not well captured by the traditional methods. Further, there was a substantial variation in the strength and nature of teleconnection across India, and across time scales.
Overall, the results from investigations conducted in the thesis strongly highlight the need for considering the multi-scale aspects in climatic processes, and the proposed methods provide robust framework for quantifying the multi-scale characteristics.
Understanding the rates and processes of denudation is key to unraveling the dynamic processes that shape active orogens. This includes decoding the roles of tectonic and climate-driven processes in the long-term evolution of high- mountain landscapes in regions with pronounced tectonic activity and steep climatic and surface-process gradients. Well-constrained denudation rates can be used to address a wide range of geologic problems. In steady-state landscapes, denudation rates are argued to be proportional to tectonic or isostatic uplift rates and provide valuable insight into the tectonic regimes underlying surface denudation. The use of denudation rates based on terrestrial cosmogenic nuclide (TCN) such as 10Beryllium has become a widely-used method to quantify catchment-mean denudation rates. Because such measurements are averaged over timescales of 102 to 105 years, they are not as susceptible to stochastic changes as shorter-term denudation rate estimates (e.g., from suspended sediment measurements) and are therefore considered more reliable for a comparison to long-term processes that operate on geologic timescales. However, the impact of various climatic, biotic, and surface processes on 10Be concentrations and the resultant denudation rates remains unclear and is subject to ongoing discussion. In this thesis, I explore the interaction of climate, the biosphere, topography, and geology in forcing and modulating denudation rates on catchment to orogen scales.
There are many processes in highly dynamic active orogens that may effect 10Be concentrations in modern river sands and therefore impact 10Be-derived denudation rates. The calculation of denudation rates from 10Be concentrations, however, requires a suite of simplifying assumptions that may not be valid or applicable in many orogens. I investigate how these processes affect 10Be concentrations in the Arun Valley of Eastern Nepal using 34 new 10Be measurements from the main stem Arun River and its tributaries. The Arun Valley is characterized by steep gradients in climate and topography, with elevations ranging from <100 m asl in the foreland basin to >8,000 asl in the high sectors to the north. This is coupled with a five-fold increase in mean annual rainfall across strike of the orogen. Denudation rates from tributary samples increase toward the core of the orogen, from <0.2 to >5 mm/yr from the Lesser to Higher Himalaya. Very high denudation rates (>2 mm/yr), however, are likely the result of 10Be TCN dilution by surface and climatic processes, such as large landsliding and glaciation, and thus may not be representative of long-term denudation rates. Mainstem Arun denudation rates increase downstream from ~0.2 mm/yr at the border with Tibet to 0.91 mm/yr at its outlet into the Sapt Kosi. However, the downstream 10Be concentrations may not be representative of the entire upstream catchment. Instead, I document evidence for downstream fining of grains from the Tibetan Plateau, resulting in an order-of-magnitude apparent decrease in the measured 10Be concentration.
In the Arun Valley and across the Himalaya, topography, climate, and vegetation are strongly interrelated. The observed increase in denudation rates at the transition from the Lesser to Higher Himalaya corresponds to abrupt increases in elevation, hillslope gradient, and mean annual rainfall. Thus, across strike (N-S), it is difficult to decipher the potential impacts of climate and vegetation cover on denudation rates. To further evaluate these relationships I instead took advantage of an along-strike west-to-east increase of mean annual rainfall and vegetation density in the Himalaya. An analysis of 136 published 10Be denudation rates from along strike of the revealed that median denudation rates do not vary considerably along strike of the Himalaya, ~1500 km E-W. However, the range of denudation rates generally decreases from west to east, with more variable denudation rates in the northwestern regions of the orogen than in the eastern regions. This denudation rate variability decreases as vegetation density increases (R=- 0.90), and increases proportionately to the annual seasonality of vegetation (R=0.99). Moreover, rainfall and vegetation modulate the relationship between topographic steepness and denudation rates such that in the wet, densely vegetated regions of the Himalaya, topography responds more linearly to changes in denudation rates than in dry, sparsely vegetated regions, where the response of topographic steepness to denudation rates is highly nonlinear. Understanding the relationships between denudation rates, topography, and climate is also critical for interpreting sedimentary archives. However, there is a lack of understanding of how terrestrial organic matter is transported out of orogens and into sedimentary archives. Plant wax lipid biomarkers derived from terrestrial and marine sedimentary records are commonly used as paleo- hydrologic proxy to help elucidate these problems. I address the issue of how to interpret the biomarker record by using the plant wax isotopic composition of modern suspended and riverbank organic matter to identify and quantify organic matter source regions in the Arun Valley. Topographic and geomorphic analysis, provided by the 10Be catchment-mean denudation rates, reveals that a combination of topographic steepness (as a proxy for denudation) and vegetation density is required to capture organic matter sourcing in the Arun River.
My studies highlight the importance of a rigorous and careful interpretation of denudation rates in tectonically active orogens that are furthermore characterized by strong climatic and biotic gradients. Unambiguous information about these issues is critical for correctly decoding and interpreting the possible tectonic and climatic forces that drive erosion and denudation, and the manifestation of the erosion products in sedimentary archives.
Tectonic and geological processes on Earth often result in structural anisotropy of the subsurface, which can be imaged by various geophysical methods. In order to achieve appropriate and realistic Earth models for interpretation, inversion algorithms have to allow for an anisotropic subsurface. Within the framework of this thesis, I analyzed a magnetotelluric (MT) data set taken from the Cape Fold Belt in South Africa. This data set exhibited strong indications for crustal anisotropy, e.g. MT phases out of the expected quadrant, which are beyond of fitting and interpreting with standard isotropic inversion algorithms. To overcome this obstacle, I have developed a two-dimensional inversion method for reconstructing anisotropic electrical conductivity distributions. The MT inverse problem represents in general a non-linear and ill-posed minimization problem with many degrees of freedom: In isotropic case, we have to assign an electrical conductivity value to each cell of a large grid to assimilate the Earth's subsurface, e.g. a grid with 100 x 50 cells results in 5000 unknown model parameters in an isotropic case; in contrast, we have the sixfold in an anisotropic scenario where the single value of electrical conductivity becomes a symmetric, real-valued tensor while the number of the data remains unchanged. In order to successfully invert for anisotropic conductivities and to overcome the non-uniqueness of the solution of the inverse problem it is necessary to use appropriate constraints on the class of allowed models. This becomes even more important as MT data is not equally sensitive to all anisotropic parameters. In this thesis, I have developed an algorithm through which the solution of the anisotropic inversion problem is calculated by minimization of a global penalty functional consisting of three entries: the data misfit, the model roughness constraint and the anisotropy constraint. For comparison, in an isotropic approach only the first two entries are minimized. The newly defined anisotropy term is measured by the sum of the square difference of the principal conductivity values of the model. The basic idea of this constraint is straightforward. If an isotropic model is already adequate to explain the data, there is no need to introduce electrical anisotropy at all. In order to ensure successful inversion, appropriate trade-off parameters, also known as regularization parameters, have to be chosen for the different model constraints. Synthetic tests show that using fixed trade-off parameters usually causes the inversion to end up by either a smooth model with large RMS error or a rough model with small RMS error. Using of a relaxation approach on the regularization parameters after each successful inversion iteration will result in smoother inversion model and a better convergence. This approach seems to be a sophisticated way for the selection of trade-off parameters. In general, the proposed inversion method is adequate for resolving the principal conductivities defined in horizontal plane. Once none of the principal directions of the anisotropic structure is coincided with the predefined strike direction, only the corresponding effective conductivities, which is the projection of the principal conductivities onto the model coordinate axes direction, can be resolved and the information about the rotation angles is lost. In the end the MT data from the Cape Fold Belt in South Africa has been analyzed. The MT data exhibits an area (> 10 km) where MT phases over 90 degrees occur. This part of data cannot be modeled by standard isotropic modeling procedures and hence can not be properly interpreted. The proposed inversion method, however, could not reproduce the anomalous large phases as desired because of losing the information about rotation angles. MT phases outside the first quadrant are usually obtained by different anisotropic anomalies with oblique anisotropy strike. In order to achieve this challenge, the algorithm needs further developments. However, forward modeling studies with the MT data have shown that surface highly conductive heterogeneity in combination with a mid-crustal electrically anisotropic zone are required to fit the data. According to known geological and tectonic information the mid-crustal zone is interpreted as a deep aquifer related to the fractured Table Mountain Group rocks in the Cape Fold Belt.
Skarn deposits are found on every continents and were formed at different times from Precambrian to Tertiary. Typically, the formation of a skarn is induced by a granitic intrusion in carbonates-rich sedimentary rocks. During contact metamorphism, fluids derived from the granite interact with the sedimentary host rocks, which results in the formation of calc-silicate minerals at the expense of carbonates. Those newly formed minerals generally develop in a metamorphic zoned aureole with garnet in the proximal and pyroxene in the distal zone. Ore elements contained in magmatic fluids are precipitated due to the change in fluid composition. The temperature decrease of the entire system, due to the cooling of magmatic fluids and the entering of meteoric water, allows retrogression of some prograde minerals.
The Hämmerlein skarn deposit has a multi-stage history with a skarn formation during regional metamorphism and a retrogression of primary skarn minerals during the granitic intrusion. Tin was mobilized during both events. The 340 Ma old tin-bearing skarn minerals show that tin was present in sediments before the granite intrusion, and that the first Sn enrichment occurred during the skarn formation by regional metamorphism fluids. In a second step at ca. 320 Ma, tin-bearing fluids were produced with the intrusion of the Eibenstock granite. Tin, which has been added by the granite and remobilized from skarn calc-silicates, precipitated as cassiterite.
Compared to clay or marl, the skarn is enriched in Sn, W, In, Zn, and Cu. These metals have been supplied during both regional metamorphism and granite emplacement. In addition, the several isotopic and chemical data of skarn samples show that the granite selectively added elements such as Sn, and that there was no visible granitic contribution to the sedimentary signature of the skarn
The example of Hämmerlein shows that it is possible to form a tin-rich skarn without associated granite when tin has already been transported from tin-bearing sediments during regional metamorphism by aqueous metamorphic fluids. These skarns are economically not interesting if tin is only contained in the skarn minerals. Later alteration of the skarn (the heat and fluid source is not necessarily a granite), however, can lead to the formation of secondary cassiterite (SnO2), with which the skarn can become economically highly interesting.
It is commonly recognized that soil moisture exhibits spatial heterogeneities occurring in a wide range of scales. These heterogeneities are caused by different factors ranging from soil structure at the plot scale to land use at the landscape scale. There is an urgent need for effi-cient approaches to deal with soil moisture heterogeneity at large scales, where manage-ment decisions are usually made. The aim of this dissertation was to test innovative ap-proaches for making efficient use of standard soil hydrological data in order to assess seep-age rates and main controls on observed hydrological behavior, including the role of soil het-erogeneities.
As a first step, the applicability of a simplified Buckingham-Darcy method to estimate deep seepage fluxes from point information of soil moisture dynamics was assessed. This was done in a numerical experiment considering a broad range of soil textures and textural het-erogeneities. The method performed well for most soil texture classes. However, in pure sand where seepage fluxes were dominated by heterogeneous flow fields it turned out to be not applicable, because it simply neglects the effect of water flow heterogeneity. In this study a need for new efficient approaches to handle heterogeneities in one-dimensional water flux models was identified.
As a further step, an approach to turn the problem of soil moisture heterogeneity into a solu-tion was presented: Principal component analysis was applied to make use of the variability among soil moisture time series for analyzing apparently complex soil hydrological systems. It can be used for identifying the main controls on the hydrological behavior, quantifying their relevance, and describing their particular effects by functional averaged time series. The ap-proach was firstly tested with soil moisture time series simulated for different texture classes in homogeneous and heterogeneous model domains. Afterwards, it was applied to 57 mois-ture time series measured in a multifactorial long term field experiment in Northeast Germa-ny.
The dimensionality of both data sets was rather low, because more than 85 % of the total moisture variance could already be explained by the hydrological input signal and by signal transformation with soil depth. The perspective of signal transformation, i.e. analyzing how hydrological input signals (e.g., rainfall, snow melt) propagate through the vadose zone, turned out to be a valuable supplement to the common mass flux considerations. Neither different textures nor spatial heterogeneities affected the general kind of signal transfor-mation showing that complex spatial structures do not necessarily evoke a complex hydro-logical behavior. In case of the field measured data another 3.6% of the total variance was unambiguously explained by different cropping systems. Additionally, it was shown that dif-ferent soil tillage practices did not affect the soil moisture dynamics at all.
The presented approach does not require a priori assumptions about the nature of physical processes, and it is not restricted to specific scales. Thus, it opens various possibilities to in-corporate the key information from monitoring data sets into the modeling exercise and thereby reduce model uncertainties.
Trends in precipitation over Germany and the Rhine basin related to changes in weather patterns
(2017)
Precipitation as the central meteorological feature for agriculture, water security, and human well-being amongst others, has gained special attention ever since. Lack of precipitation may have devastating effects such as crop failure and water scarcity. Abundance of precipitation, on the other hand, may as well result in hazardous events such as flooding and again crop failure. Thus, great effort has been spent on tracking changes in precipitation and relating them to underlying processes. Particularly in the face of global warming and given the link between temperature and atmospheric water holding capacity, research is needed to understand the effect of climate change on precipitation.
The present work aims at understanding past changes in precipitation and other meteorological variables. Trends were detected for various time periods and related to associated changes in large-scale atmospheric circulation. The results derived in this thesis may be used as the foundation for attributing changes in floods to climate change. Assumptions needed for the downscaling of large-scale circulation model output to local climate stations are tested and verified here.
In a first step, changes in precipitation over Germany were detected, focussing not only on precipitation totals, but also on properties of the statistical distribution, transition probabilities as a measure for wet/dry spells, and extreme precipitation events.
Shifting the spatial focus to the Rhine catchment as one of the major water lifelines of Europe and the largest river basin in Germany, detected trends in precipitation and other meteorological variables were analysed in relation to states of an ``optimal'' weather pattern classification. The weather pattern classification was developed seeking the best skill in explaining the variance of local climate variables.
The last question addressed whether observed changes in local climate variables are attributable to changes in the frequency of weather patterns or rather to changes within the patterns itself. A common assumption for a downscaling approach using weather patterns and a stochastic weather generator is that climate change is expressed only as a changed occurrence of patterns with the pattern properties remaining constant. This assumption was validated and the ability of the latest generation of general circulation models to reproduce the weather patterns was evaluated.
% Paper 1
Precipitation changes in Germany in the period 1951-2006 can be summarised briefly as negative in summer and positive in all other seasons. Different precipitation characteristics confirm the trends in total precipitation: while winter mean and extreme precipitation have increased, wet spells tend to be longer as well (expressed as increased probability for a wet day followed by another wet day). For summer the opposite was observed: reduced total precipitation, supported by decreasing mean and extreme precipitation and reflected in an increasing length of dry spells.
Apart from this general summary for the whole of Germany, the spatial distribution within the country is much more differentiated. Increases in winter precipitation are most pronounced in the north-west and south-east of Germany, while precipitation increases are highest in the west for spring and in the south for autumn. Decreasing summer precipitation was observed in most regions of Germany, with particular focus on the south and west.
The seasonal picture, however, was again differently represented in the contributing months, e.g.\ increasing autumn precipitation in the south of Germany is formed by strong trends in the south-west in October and in the south-east in November. These results emphasise the high spatial and temporal organisation of precipitation changes.
% Paper 2
The next step towards attributing precipitation trends to changes in large-scale atmospheric patterns was the derivation of a weather pattern classification that sufficiently stratifies the local climate variables under investigation. Focussing on temperature, radiation, and humidity in addition to precipitation, a classification based on mean sea level pressure, near-surface temperature, and specific humidity was found to have the best skill in explaining the variance of the local variables. A rather high number of 40 patterns was selected, allowing typical pressure patterns being assigned to specific seasons by the associated temperature patterns. While the skill in explaining precipitation variance is rather low, better skill was achieved for radiation and, of course, temperature.
Most of the recent GCMs from the CMIP5 ensemble were found to reproduce these weather patterns sufficiently well in terms of frequency, seasonality, and persistence.
% Paper 3
Finally, the weather patterns were analysed for trends in pattern frequency, seasonality, persistence, and trends in pattern-specific precipitation and temperature. To overcome uncertainties in trend detection resulting from the selected time period, all possible periods in 1901-2010 with a minimum length of 31 years were considered. Thus, the assumption of a constant link between patterns and local weather was tested rigorously. This assumption was found to hold true only partly. While changes in temperature are mainly attributable to changes in pattern frequency, for precipitation a substantial amount of change was detected within individual patterns.
Magnitude and even sign of trends depend highly on the selected time period. The frequency of certain patterns is related to the long-term variability of large-scale circulation modes.
Changes in precipitation were found to be heterogeneous not only in space, but also in time - statements on trends are only valid for the specific time period under investigation. While some part of the trends can be attributed to changes in the large-scale circulation, distinct changes were found within single weather patterns as well.
The results emphasise the need to analyse multiple periods for thorough trend detection wherever possible and add some note of caution to the application of downscaling approaches based on weather patterns, as they might misinterpret the effect of climate change due to neglecting within-type trends.
Transient permeability in porous and fractured sandstones mediated by fluid-rock interactions
(2021)
Understanding the fluid transport properties of subsurface rocks is essential for a large number of geotechnical applications, such as hydrocarbon (oil/gas) exploitation, geological storage (CO2/fluids), and geothermal reservoir utilization. To date, the hydromechanically-dependent fluid flow patterns in porous media and single macroscopic rock fractures have received numerous investigations and are relatively well understood. In contrast, fluid-rock interactions, which may permanently affect rock permeability by reshaping the structure and changing connectivity of pore throats or fracture apertures, need to be further elaborated. This is of significant importance for improving the knowledge of the long-term evolution of rock transport properties and evaluating a reservoir’ sustainability. The thesis focuses on geothermal energy utilization, e.g., seasonal heat storage in aquifers and enhanced geothermal systems, where single fluid flow in porous rocks and rock fracture networks under various pressure and temperature conditions dominates.
In this experimental study, outcrop samples (i.e., Flechtinger sandstone, an illite-bearing Lower Permian rock, and Fontainebleau sandstone, consisting of pure quartz) were used for flow-through experiments under simulated hydrothermal conditions. The themes of the thesis are (1) the investigation of clay particle migration in intact Flechtinger sandstone and the coincident permeability damage upon cyclic temperature and fluid salinity variations; (2) the determination of hydro-mechanical properties of self-propping fractures in Flechtinger and Fontainebleau sandstones with different fracture features and contrasting mechanical properties; and (3) the investigation of the time-dependent fracture aperture evolution of Fontainebleau sandstone induced by fluid-rock interactions (i.e., predominantly pressure solution). Overall, the thesis aims to unravel the mechanisms of the instantaneous reduction (i.e., direct responses to thermo-hydro-mechanical-chemical (THMC) conditions) and progressively-cumulative changes (i.e., time-dependence) of rock transport properties.
Permeability of intact Flechtinger sandstone samples was measured under each constant condition, where temperature (room temperature up to 145 °C) and fluid salinity (NaCl: 0 ~ 2 mol/l) were stepwise changed. Mercury intrusion porosimetry (MIP), electron microprobe analysis (EMPA), and scanning electron microscopy (SEM) were performed to investigate the changes of local porosity, microstructures, and clay element contents before and after the experiments. The results indicate that the permeability of illite-bearing Flechtinger sandstones will be impaired by heating and exposure to low salinity pore fluids. The chemically induced permeability variations prove to be path-dependent concerning the applied succession of fluid salinity changes. The permeability decay induced by a temperature increase and a fluid salinity reduction operates by relatively independent mechanisms, i.e., thermo-mechanical and thermo-chemical effects.
Further, the hydro-mechanical investigations of single macroscopic fractures (aligned, mismatched tensile fractures, and smooth saw-cut fractures) illustrate that a relative fracture wall offset could significantly increase fracture aperture and permeability, but the degree of increase depends on fracture surface roughness. X-ray computed tomography (CT) demonstrates that the contact area ratio after the pressure cycles is inversely correlated to the fracture offset. Moreover, rock mechanical properties, determining the strength of contact asperities, are crucial so that relatively harder rock (i.e., Fontainebleau sandstone) would have a higher self-propping potential for sustainable permeability during pressurization. This implies that self-propping rough fractures with a sufficient displacement are efficient pathways for fluid flow if the rock matrix is mechanically strong.
Finally, two long-term flow-through experiments with Fontainebleau sandstone samples containing single fractures were conducted with an intermittent flow (~140 days) and continuous flow (~120 days), respectively. Permeability and fluid element concentrations were measured throughout the experiments. Permeability reduction occurred at the beginning stage when the stress was applied, while it converged at later stages, even under stressed conditions. Fluid chemistry and microstructure observations demonstrate that pressure solution governs the long-term fracture aperture deformation, with remarkable effects of the pore fluid (Si) concentration and the structure of contact grain boundaries. The retardation and the cessation of rock fracture deformation are mainly induced by the contact stress decrease due to contact area enlargement and a dissolved mass accumulation within the contact boundaries. This work implies that fracture closure under constant (pressure/stress and temperature) conditions is likely a spontaneous process, especially at the beginning stage after pressurization when the contact area is relatively small. In contrast, a contact area growth yields changes of fracture closure behavior due to the evolution of contact boundaries and concurrent changes in their diffusive properties. Fracture aperture and thus permeability will likely be sustainable in the long term if no other processes (e.g., mineral precipitations in the open void space) occur.
The tropical warm pool waters surrounding Indonesia are one of the equatorial heat and moisture sources that are considered as a driving force of the global climate system. The climate in Indonesia is dominated by the equatorial monsoon system, and has been linked to El Niño-Southern Oscillation (ENSO) events, which often result in severe droughts or floods over Indonesia with profound societal and economic impacts on the populations living in the world's fourth most populated country. The latest IPCC report states that ENSO will remain the dominant mode in the tropical Pacific with global effects in the 21st century and ENSO-related precipitation extremes will intensify. However, no common agreement exists among climate simulation models for projected change in ENSO and the Australian-Indonesian Monsoon. Exploring high-resolution palaeoclimate archives, like tree rings or varved lake sediments, provide insights into the natural climate variability of the past, and thus helps improving and validating simulations of future climate changes. Centennial tree-ring stable isotope records | Within this doctoral thesis the main goal was to explore the potential of tropical tree rings to record climate signals and to use them as palaeoclimate proxies. In detail, stable carbon (δ13C) and oxygen (δ18O) isotopes were extracted from teak trees in order to establish the first well-replicated centennial (AD 1900-2007) stable isotope records for Java, Indonesia. Furthermore, different climatic variables were tested whether they show significant correlation with tree-ring proxies (ring-width, δ13C, δ18O). Moreover, highly resolved intra-annual oxygen isotope data were established to assess the transfer of the seasonal precipitation signal into the tree rings. Finally, the established oxygen isotope record was used to reveal possible correlations with ENSO events. Methodological achievements | A second goal of this thesis was to assess the applicability of novel techniques which facilitate and optimize high-resolution and high-throughput stable isotope analysis of tree rings. Two different UV-laser-based microscopic dissection systems were evaluated as a novel sampling tool for high-resolution stable isotope analysis. Furthermore, an improved procedure of tree-ring dissection from thin cellulose laths for stable isotope analysis was designed. The most important findings of this thesis are: I) The herein presented novel sampling techniques improve stable isotope analyses for tree-ring studies in terms of precision, efficiency and quality. The UV-laser-based microdissection serve as a valuable tool for sampling plant tissue at ultrahigh-resolution and for unprecedented precision. II) A guideline for a modified method of cellulose extraction from wholewood cross-sections and subsequent tree-ring dissection was established. The novel technique optimizes the stable isotope analysis process in two ways: faster and high-throughput cellulose extraction and precise tree-ring separation at annual to high-resolution scale. III) The centennial tree-ring stable isotope records reveal significant correlation with regional precipitation. High-resolution stable oxygen values, furthermore, allow distinguishing between dry and rainy season rainfall. IV) The δ18O record reveals significant correlation with different ENSO flavors and demonstrates the importance of considering ENSO flavors when interpreting palaeoclimatic data in the tropics. The findings of my dissertation show that seasonally resolved δ18O records from Indonesian teak trees are a valuable proxy for multi-centennial reconstructions of regional precipitation variability (monsoon signals) and large-scale ocean-atmosphere phenomena (ENSO) for the Indo-Pacific region. Furthermore, the novel methodological achievements offer many unexplored avenues for multidisciplinary research in high-resolution palaeoclimatology.
Towards unifying approaches in exposure modelling for scenario-based multi-hazard risk assessments
(2023)
This cumulative thesis presents a stepwise investigation of the exposure modelling process for risk assessment due to natural hazards while highlighting its, to date, not much-discussed importance and associated uncertainties. Although “exposure” refers to a very broad concept of everything (and everyone) that is susceptible to damage, in this thesis it is narrowed down to the modelling of large-area residential building stocks. Classical building exposure models for risk applications have been constructed fully relying on unverified expert elicitation over data sources (e.g., outdated census datasets), and hence have been implicitly assumed to be static in time and in space. Moreover, their spatial representation has also typically been simplified by geographically aggregating the inferred composition onto coarse administrative units whose boundaries do not always capture the spatial variability of the hazard intensities required for accurate risk assessments. These two shortcomings and the related epistemic uncertainties embedded within exposure models are tackled in the first three chapters of the thesis. The exposure composition of large-area residential building stocks is studied on the scope of scenario-based earthquake loss models. Then, the proposal of optimal spatial aggregation areas of exposure models for various hazard-related vulnerabilities is presented, focusing on ground-shaking and tsunami risks. Subsequently, once the experience is gained in the study of the composition and spatial aggregation of exposure for various hazards, this thesis moves towards a multi-hazard context while addressing cumulative damage and losses due to consecutive hazard scenarios. This is achieved by proposing a novel method to account for the pre-existing damage descriptions on building portfolios as a key input to account for scenario-based multi-risk assessment. Finally, this thesis shows how the integration of the aforementioned elements can be used in risk communication practices. This is done through a modular architecture based on the exploration of quantitative risk scenarios that are contrasted with social risk perceptions of the directly exposed communities to natural hazards.
In Chapter 1, a Bayesian approach is proposed to update the prior assumptions on such composition (i.e., proportions per building typology). This is achieved by integrating high-quality real observations and then capturing the intrinsic probabilistic nature of the exposure model. Such observations are accounted as real evidence from both: field inspections (Chapter 2) and freely available data sources to update existing (but outdated) exposure models (Chapter 3). In these two chapters, earthquake scenarios with parametrised ground motion fields were transversally used to investigate the role of such epistemic uncertainties related to the exposure composition through sensitivity analyses. Parametrised scenarios of seismic ground shaking were the hazard input utilised to study the physical vulnerability of building portfolios. The second issue that was investigated, which refers to the spatial aggregation of building exposure models, was investigated within two decoupled vulnerability contexts: due to seismic ground shaking through the integration of remote sensing techniques (Chapter 3); and within a multi-hazard context by integrating the occurrence of associated tsunamis (Chapter 4). Therein, a careful selection of the spatial aggregation entities while pursuing computational efficiency and accuracy in the risk estimates due to such independent hazard scenarios (i.e., earthquake and tsunami) are discussed. Therefore, in this thesis, the physical vulnerability of large-area building portfolios due to tsunamis is considered through two main frames: considering and disregarding the interaction at the vulnerability level, through consecutive and decoupled hazard scenarios respectively, which were then contrasted.
Contrary to Chapter 4, where no cumulative damages are addressed, in Chapter 5, data and approaches, which were already generated in former sections, are integrated with a novel modular method to ultimately study the likely interactions at the vulnerability level on building portfolios. This is tested by evaluating cumulative damages and losses after earthquakes with increasing magnitude followed by their respective tsunamis. Such a novel method is grounded on the possibility of re-using existing fragility models within a probabilistic framework. The same approach is followed in Chapter 6 to forecast the likely cumulative damages to be experienced by a building stock located in a volcanic multi-hazard setting (ash-fall and lahars). In that section, special focus was made on the manner the forecasted loss metrics are communicated to locally exposed communities. Co-existing quantitative scientific approaches (i.e., comprehensive exposure models; explorative risk scenarios involving single and multiple hazards) and semi-qualitative social risk perception (i.e., level of understanding that the exposed communities have about their own risk) were jointly considered. Such an integration ultimately allowed this thesis to also contribute to enhancing preparedness, science divulgation at the local level as well as technology transfer initiatives.
Finally, a synthesis of this thesis along with some perspectives for improvement and future work are presented.
The East African Plateau provides a spectacular example of geodynamic plateau uplift, active continental rifting, and associated climatic forcing. It is an integral part of the East African Rift System and has an average elevation of approximately 1,000 m. Its location coincides with a negative Bouguer gravity anomaly with a semi-circular shape, closely related to a mantle plume, which influences the Cenozoic crustal development since its impingement in Eocene-Oligocene time. The uplift of the East African Plateau, preceding volcanism, and rifting formed an important orographic barrier and tectonically controlled environment, which is profoundly influenced by climate driven processes. Its location within the equatorial realm supports recently proposed hypotheses, that topographic changes in this region must be considered as the dominant forcing factor influencing atmospheric circulation patterns and rainfall distribution. The uplift of this region has therefore often been associated with fundamental climatic and environmental changes in East Africa and adjacent regions. While the far-reaching influence of the plateau uplift is widely accepted, the timing and the magnitude of the uplift are ambiguous and are still subject to ongoing discussion. This dilemma stems from the lack of datable, geomorphically meaningful reference horizons that could record surface uplift. In order to quantify the amount of plateau uplift and to find evidence for the existence of significant relief along the East African Plateau prior to rifting, I analyzed and modeled one of the longest terrestrial lava flows; the 300-km-long Yatta phonolite flow in Kenya. This lava flow is 13.5 Ma old and originated in the region that now corresponds to the eastern rift shoulders. The phonolitic flow utilized an old riverbed that once drained the eastern flank of the plateau. Due to differential erosion this lava flow now forms a positive relief above the parallel-flowing Athi River, which is mimicking the course of the paleo-river. My approach is a lava-flow modeling, based on an improved composition and temperature dependent method to parameterize the flow of an arbitrary lava in a rectangular-shaped channel. The essential growth pattern is described by a one-dimensional model, in which Newtonian rheological flow advance is governed by the development of viscosity and/or velocity in the internal parts of the lava-flow front. Comparing assessments of different magma compositions reveal that length-dominated, channelized lava flows are characterized by high effusion rates, rapid emplacement under approximately isothermal conditions, and laminar flow. By integrating the Yatta lava flow dimensions and the covered paleo-topography (slope angle) into the model, I was able to determine the pre-rift topography of the East African Plateau. The modeling results yield a pre-rift slope of at least 0.2°, suggesting that the lava flow must have originated at a minimum elevation of 1,400 m. Hence, high topography in the region of the present-day Kenya Rift must have existed by at least 13.5 Ma. This inferred mid-Miocene uplift coincides with the two-step expansion of grasslands, as well as important radiation and speciation events in tropical Africa. Accordingly, the combination of my results regarding the Yatta lava flow emplacement history, its location, and its morphologic character, validates it as a suitable “paleo-tiltmeter” and has thus to be considered as an important topographic and volcanic feature for the topographic evolution in East Africa.