TY - THES A1 - Schwab, Markus Julius T1 - Rekonstruktion der spätquartären Klima- und Umweltgeschichte der Schirmacher Oase und des Wohlthat Massivs (Ostantarktika) Y1 - 1998 ER - TY - JOUR A1 - Ben Dor, Yoav A1 - Neugebauer, Ina A1 - Enzel, Yehouda A1 - Schwab, Markus Julius A1 - Tjallingii, Rik A1 - Erel, Yigal A1 - Brauer, Achim T1 - Varves of the Dead Sea sedimentary record JF - Quaternary science reviews : the international multidisciplinary research and review journal N2 - The sedimentary record of the Dead Sea provides an exceptional high-resolution archive of past climate changes in the drought-sensitive eastern Mediterranean-Levant, a key region for the development of humankind at the boundary of global climate belts. Moreover, it is the only deep hypersaline lake known to have deposited long sequences of finely laminated, annually deposited sediments (i.e. varves) of varied compositions, including aragonite, gypsum, halite and clastic sediments. Vast efforts have been made over the years to decipher the environmental information stored in these evaporitic-clastic sequences spanning from the Pleistocene Lake Amora to the Holocene Dead Sea. A general characterisation of sediment facies has been derived from exposed sediment sections, as well as from shallow- and deep-water sediment cores. During high lake stands and episodes of positive water budget, mostly during glacial times, alternating aragonite and detritus laminae (‘aad’ facies) were accumulated, whereas during low lake stands and droughts, prevailing during interglacials, laminated detritus (‘ld’ facies) and laminated halite (‘lh’ facies) dominate the sequence. In this paper, we (i) review the three types of laminated sediments of the Dead Sea sedimentary record (‘aad’, ‘ld’ and ‘lh’ facies), (ii) discuss their modes of formation, deposition and accumulation, and their interpretation as varves, and (iii) illustrate how Dead Sea varves are utilized for palaeoclimate reconstructions and for establishing floating chronologies. KW - ICDP Dead Sea deep drilling KW - Hypersaline lake KW - Lacustrine sediments KW - Evaporitic varves KW - Palaeoclimate reconstruction KW - Varve chronologies Y1 - 2019 U6 - https://doi.org/10.1016/j.quascirev.2019.04.011 SN - 0277-3791 VL - 215 SP - 173 EP - 184 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Müller, Daniela A1 - Tjallingii, Rik A1 - Plociennik, Mateusz A1 - Luoto, Tomi P. A1 - Kotrys, Bartosz A1 - Plessen, Birgit A1 - Ramisch, Arne A1 - Schwab, Markus Julius A1 - Blaszkiewicz, Miroslaw A1 - Slowinski, Michal A1 - Brauer, Achim T1 - New insights into lake responses to rapid climate change BT - The Younger Dryas in Lake Goscia(z) over dot, central Poland JF - Boreas N2 - The sediment profile from Lake Goscia(z) over dot in central Poland comprises a continuous, seasonally resolved and exceptionally well-preserved archive of the Younger Dryas (YD) climate variation. This provides a unique opportunity for detailed investigation of lake system responses during periods of rapid climate cooling (YD onset) and warming (YD termination). The new varve record of Lake Goscia(z) over dot presented here spans 1662 years from the late Allerod (AL) to the early Preboreal (PB). Microscopic varve counting provides an independent chronology with a YD duration of 1149+14/-22 years, which confirms previous results of 1140 +/- 40 years. We link stable oxygen isotopes and chironomid-based air temperature reconstructions with the response of various geochemical and varve microfacies proxies especially focusing on the onset and termination of the YD. Cooling at the YD onset lasted similar to 180 years, which is about a century longer than the terminal warming that was completed in similar to 70 years. During the AL/YD transition, environmental proxy data lagged the onset of cooling by similar to 90 years and revealed an increase of lake productivity and internal lake re-suspension as well as slightly higher detrital sediment input. In contrast, rapid warming and environmental changes during the YD/PB transition occurred simultaneously. However, initial changes such as declining diatom deposition and detrital input occurred already a few centuries before the rapid warming at the YD/PB transition. These environmental changes likely reflect a gradual increase in summer air temperatures already during the YD. Our data indicate complex and differing environmental responses to the major climate changes related to the YD, which involve different proxy sensitivities and threshold processes. KW - central Poland KW - Younger Dryas KW - sedimentation pattern KW - lake sediments Y1 - 2021 U6 - https://doi.org/10.23689/fidgeo-4033 SN - 0300-9483 SN - 1502-3885 VL - 50 IS - 2 SP - 535 EP - 555 PB - Wiley CY - Hoboken ER - TY - GEN A1 - Müller, Daniela A1 - Tjallingii, Rik A1 - Plociennik, Mateusz A1 - Luoto, Tomi P. A1 - Kotrys, Bartosz A1 - Plessen, Birgit A1 - Ramisch, Arne A1 - Schwab, Markus Julius A1 - Blaszkiewicz, Miroslaw A1 - Slowinski, Michal A1 - Brauer, Achim T1 - New insights into lake responses to rapid climate change BT - The Younger Dryas in Lake Goscia(z) over dot, central Poland T2 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe N2 - The sediment profile from Lake Goscia(z) over dot in central Poland comprises a continuous, seasonally resolved and exceptionally well-preserved archive of the Younger Dryas (YD) climate variation. This provides a unique opportunity for detailed investigation of lake system responses during periods of rapid climate cooling (YD onset) and warming (YD termination). The new varve record of Lake Goscia(z) over dot presented here spans 1662 years from the late Allerod (AL) to the early Preboreal (PB). Microscopic varve counting provides an independent chronology with a YD duration of 1149+14/-22 years, which confirms previous results of 1140 +/- 40 years. We link stable oxygen isotopes and chironomid-based air temperature reconstructions with the response of various geochemical and varve microfacies proxies especially focusing on the onset and termination of the YD. Cooling at the YD onset lasted similar to 180 years, which is about a century longer than the terminal warming that was completed in similar to 70 years. During the AL/YD transition, environmental proxy data lagged the onset of cooling by similar to 90 years and revealed an increase of lake productivity and internal lake re-suspension as well as slightly higher detrital sediment input. In contrast, rapid warming and environmental changes during the YD/PB transition occurred simultaneously. However, initial changes such as declining diatom deposition and detrital input occurred already a few centuries before the rapid warming at the YD/PB transition. These environmental changes likely reflect a gradual increase in summer air temperatures already during the YD. Our data indicate complex and differing environmental responses to the major climate changes related to the YD, which involve different proxy sensitivities and threshold processes. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1359 KW - central Poland KW - Younger Dryas KW - sedimentation pattern KW - lake sediments Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-563386 SN - 0300-9483 SN - 1502-3885 SN - 1866-8372 IS - 2 ER - TY - JOUR A1 - Müller, Daniela A1 - Neugebauer, Ina A1 - Ben Dor, Yoav A1 - Enzel, Yehouda A1 - Schwab, Markus Julius A1 - Tjallingii, Rik A1 - Brauer, Achim T1 - Phases of stability during major hydroclimate change ending the Last Glacial in the Levant JF - Scientific reports N2 - In-depth understanding of the reorganization of the hydrological cycle in response to global climate change is crucial in highly sensitive regions like the eastern Mediterranean, where water availability is a major factor for socioeconomic and political development. The sediments of Lake Lisan provide a unique record of hydroclimatic change during the last glacial to Holocene transition (ca. 24-11 ka) with its tremendous water level drop of similar to 240 m that finally led to its transition into the present hypersaline water body-the Dead Sea. Here we utilize high-resolution sedimentological analyses from the marginal terraces and deep lake to reconstruct an unprecedented seasonal record of the last millennia of Lake Lisan. Aragonite varve formation in intercalated intervals of our record demonstrates that a stepwise long-term lake level decline was interrupted by almost one millennium of rising or stable water level. Even periods of pronounced water level drops indicated by gypsum deposition were interrupted by decades of positive water budgets. Our results thus highlight that even during major climate change at the end of the last glacial, decadal to millennial periods of relatively stable or positive moisture supply occurred which could have been an important premise for human sedentism. Y1 - 2022 U6 - https://doi.org/10.1038/s41598-022-10217-9 SN - 2045-2322 VL - 12 IS - 1 PB - Macmillan Publishers Limited, part of Springer Nature CY - London ER -