Investigating the processes that led to the end of the last interglacial period is relevant for understanding how our ongoing interglacial will end, which has been a matter of much debate (see, for example, refs 1, 2). A recent ice core from Greenland demonstrates climate cooling from 122,000 years ago3 driven by orbitally controlled insolation, with glacial inception at 118,000 years ago4,5,6,7,8. Here we present an annually resolved, layer-counted record of varve thickness, quartz grain size and pollen assemblages from a maar lake in the Eifel (Germany), which documents a late Eemian aridity pulse lasting 468 years with dust storms, aridity, bushfire and a decline of thermophilous trees at the time of glacial inception. We interpret the decrease in both precipitation and temperature as an indication of a close link of this extreme climate event to a sudden southward shift of the position of the North Atlantic drift, the ocean current that brings warm surface waters to the northern European region. The late Eemian aridity pulse occurred at a 65° N July insolation of 416 W m-2, close to today's value of 428 W m-2 (ref. 9), and may therefore be relevant for the interpretation of present-day climate variability.
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Drilling of the ELSA cores was done by Stölben GmbH (www.stoelbenbohr.de), and we thank J. Schmitz for his continuous effort to increase the quality of the core material. We thank the Stiftung Rheinland-Pfalz für Innovation, which initiated the first ELSA drillings, and the DEKLIM program of the German Ministry for Education and Research, which financed ELSA over the past 5 years.Author Contributions K. Seelos, grain size analysis; K. Schaber, tuning; B.R., varve counting; F.D. and M.D., pollen analysis; K.J., varve classification; M.K. and D.D., luminescence dating.
Reprints and permissions information is available at npg.nature.com/reprintsandpermissions. The authors declare no competing financial interests.
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Sirocko, F., Seelos, K., Schaber, K. et al. A late Eemian aridity pulse in central Europe during the last glacial inception. Nature 436, 833–836 (2005). https://doi.org/10.1038/nature03905
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