Ralf Andreas Oeser, Nicole Stroncik, Lisa-Marie Moskwa, Nadine Bernhard, Mirjam Schaller, Rafaella Canessa, Liesbeth van den Brink, Moritz Köster, Emanuel Brucker, Svenja Stock, Juan Pablo Fuentes, Roberto Godoy, Francisco Javier Matus, Romulo Oses Pedraza, Pablo Osses McIntyre, Leandro Paulino, Oscar Seguel, Maaike Y. Bader, Jens Boy, Michaela A. Dippold, Todd Ehlers, Peter Kühn, Yakov Kuzyakov, Peter Leinweber, Thomas Scholten, Sandra Spielvogel, Marie Spohn, Kirstin Ubernickel, Katja Tielbörger, Dirk Wagner, Friedhelm von Blanckenburg
- From north to south, denudation rates from cosmogenic nuclides are similar to 10 t km(-2) yr(-1) at the arid Pan de Aziicar site, similar to 20 t km(2) yr(-1) at the semi-arid site of Santa Gracia, -60 t km(-2) yr(-1) at the Mediterranean climate site of La Campana, and similar to 30 t km(-2) yr(-1) at the humid site of Nahuelbuta. A and B horizons increase in thickness and elemental depletion or enrichment increases from north (similar to 26 degrees S) to south (similar to 38 degrees S) in these horizons. Differences in the degree of chemical weathering, quantified by the chemical depletion fraction (CDF), are significant only between the arid and sparsely vegetated site and the other three sites. Differences in the CDF between the sites, and elemental depletion within the sites are sometimes smaller than the variations induced by the bedrock heterogeneity. Microbial abundances (bacteria and archaea) in saprolite substantially increase from the arid to the semi-arid sites. With this study, we provide a comprehensive datasetFrom north to south, denudation rates from cosmogenic nuclides are similar to 10 t km(-2) yr(-1) at the arid Pan de Aziicar site, similar to 20 t km(2) yr(-1) at the semi-arid site of Santa Gracia, -60 t km(-2) yr(-1) at the Mediterranean climate site of La Campana, and similar to 30 t km(-2) yr(-1) at the humid site of Nahuelbuta. A and B horizons increase in thickness and elemental depletion or enrichment increases from north (similar to 26 degrees S) to south (similar to 38 degrees S) in these horizons. Differences in the degree of chemical weathering, quantified by the chemical depletion fraction (CDF), are significant only between the arid and sparsely vegetated site and the other three sites. Differences in the CDF between the sites, and elemental depletion within the sites are sometimes smaller than the variations induced by the bedrock heterogeneity. Microbial abundances (bacteria and archaea) in saprolite substantially increase from the arid to the semi-arid sites. With this study, we provide a comprehensive dataset characterizing the Critical Zone geochemistry in the Chilean Coastal Cordillera. This dataset confirms climatic controls on weathering and denudation rates and provides prerequisites to quantify the role of biota in future studies.…
MetadatenAuthor details: | Ralf Andreas OeserGND, Nicole StroncikORCiD, Lisa-Marie Moskwa, Nadine Bernhard, Mirjam Schaller, Rafaella Canessa, Liesbeth van den Brink, Moritz Köster, Emanuel Brucker, Svenja StockORCiD, Juan Pablo Fuentes, Roberto Godoy, Francisco Javier Matus, Romulo Oses Pedraza, Pablo Osses McIntyre, Leandro Paulino, Oscar SeguelORCiD, Maaike Y. Bader, Jens Boy, Michaela A. Dippold, Todd EhlersORCiDGND, Peter KühnORCiDGND, Yakov KuzyakovORCiD, Peter Leinweber, Thomas ScholtenORCiDGND, Sandra Spielvogel, Marie SpohnORCiD, Kirstin Ubernickel, Katja Tielbörger, Dirk WagnerORCiDGND, Friedhelm von BlanckenburgORCiDGND |
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DOI: | https://doi.org/10.1016/j.catena.2018.06.002 |
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ISSN: | 0341-8162 |
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ISSN: | 1872-6887 |
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Title of parent work (English): | Catena : an interdisciplinary journal of soil science, hydrology, geomorphology focusing on geoecology and landscape evolution |
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Publisher: | Elsevier |
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Place of publishing: | Amsterdam |
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Publication type: | Article |
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Language: | English |
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Year of first publication: | 2018 |
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Publication year: | 2018 |
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Release date: | 2021/07/05 |
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Tag: | Chile; Climate; Denudation; Microbial abundance; Weathering |
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Volume: | 170 |
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Number of pages: | 21 |
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First page: | 183 |
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Last Page: | 203 |
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Funding institution: | German Science Foundation DFG-SPP [1803] |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
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Peer review: | Referiert |
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Publishing method: | Open Access / Green Open-Access |
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