Brøgger Seminar Series – Abrupt hydrological changes in Western Europe during the onset of the Younger Dryas cold period, as reconstructed with lipid biomarker D/H ratios from the Meerfelder Maar sedimentary record
by Dirk Sachse , Universität Potsdam, Institut für Erd- und Umweltwissenschaften

When? 24 October,  13.00.
Where? Room U27, Geovetenskapens hus


The hydrological cycle constitutes a significant unknown variable in the prediction of the effects of climate change on regional climate patterns. Lake Meerfelder Maar (MFM) in Western Germany is a key archive due to its continuous annual varved sediment record, including tephra layers, which results in a highly precise age model. From this lake a high resolution record of paleohydrological changes during the Younger Dryas cold episode (YD) was reconstructed, based on changes in the hydrogen isotope composition (2H) of lipid biomarkers from aquatic macrophytes combined with those from higher plant-derived leaf wax components. The data are put in a regional – hemispheric perspective and emphasize that global temperature changes can result in rapid perturbations in the hydrological cycle.



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