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A dual-biomarker approach for quantification of changes in relative humidity from sedimentary lipid D/H ratios

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Rach,  Oliver
5.1 Geomorphology, 5.0 Geoarchives, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Kahmen,  Ansgar
External Organizations;

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Brauer,  A.
5.2 Climate Dynamics and Landscape Evolution, 5.0 Geoarchives, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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Sachse,  D.
5.1 Geomorphology, 5.0 Geoarchives, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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2341889.pdf
(Verlagsversion), 5MB

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Zitation

Rach, O., Kahmen, A., Brauer, A., Sachse, D. (2017): A dual-biomarker approach for quantification of changes in relative humidity from sedimentary lipid D/H ratios. - Climate of the Past, 13, 7, 741-757.
https://doi.org/10.5194/cp-13-741-2017


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_2341889
Zusammenfassung
Here we present a novel approach based on δ2H values of sedimentary lipid biomarkers in combination with plant physiological modeling to extract quantitative information on past changes in relative humidity. Our initial application to an annually laminated lacustrine sediment sequence from western Europe deposited during the Younger Dryas cold period revealed relative humidity changes of up to 15 % over sub-centennial timescales, leading to major ecosystem changes, in agreement with palynological data from the region. We show that by combining organic geochemical methods and mechanistic plant physiological models on well characterized lacustrine archives it is possible to extract quantitative ecohydrological parameters from sedimentary lipid biomarker δ2H data.