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Journal Article

An annually resolved record of Western European vegetation response to Younger Dryas cooling

Authors

Obreht,  Igor
External Organizations;

Wörmer,  Lars
External Organizations;

/persons/resource/brau

Brauer,  A.
4.3 Climate Dynamics and Landscape Evolution, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Wendt,  Jenny
External Organizations;

Alfken,  Susanne
External Organizations;

De Vleeschouwer,  David
External Organizations;

Elvert,  Marcus
External Organizations;

Hinrichs,  Kai-Uwe
External Organizations;

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Fulltext (public)

5000250.pdf
(Publisher version), 5MB

Supplementary Material (public)
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Citation

Obreht, I., Wörmer, L., Brauer, A., Wendt, J., Alfken, S., De Vleeschouwer, D., Elvert, M., Hinrichs, K.-U. (2020): An annually resolved record of Western European vegetation response to Younger Dryas cooling. - Quaternary Science Reviews, 231, 106198.
https://doi.org/10.1016/j.quascirev.2020.106198


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5000250
Abstract
The regional patterns and timing of the Younger Dryas cooling in the North Atlantic realm were complex and are mechanistically incompletely understood. To enhance understanding of regional climate patterns, we present molecular biomarker records at subannual to annual resolution by mass spectrometry imaging (MSI) of sediments from the Lake Meerfelder Maar covering the Allerød-Younger Dryas transition. These analyses are supported by conventional extraction-based molecular-isotopic analyses, which both validate the imaging results and constrain the sources of the target compounds. The targeted fatty acid biomarkers serve as a gauge of the response of the local aquatic and terrestrial ecosystem to climate change. Based on the comparison of our data with existing data from Meerfelder Maar, we analyse the short-term environmental evolution in Western Europe during the studied time interval and confirm the previously reported delayed hydrological response to Greenland cooling. However, despite a detected delay of Western European environmental change of ∼135 years, our biomarker data show statistically significant correlation with deuterium excess in Greenland ice core at ∼ annual resolution during this time-transgressive cooling. This suggests a coherent atmospheric forcing across the North Atlantic realm during this transition. We propose that Western European cooling was postponed due to major reorganization of the westerlies that were intermittently forcing warmer and wetter air masses from lower latitudes to Western Europe and thus resulted in delayed cooling relative to Greenland.