Quaternary environmental changes in central Chukotka (NE Russia) inferred from the Lake El'gygytgyn pollen records

Wenwei Zhao, Andrei A. Andreev, Volker Wennrich, Quan Li, Martin Melles

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Abstract

The 3.6-Myr sedimentary record of Lake El'gygytgyn is crucial for understanding the response of the sensitive ecosystems in the Arctic to Quaternary climate variations at orbital timescales. In this study, we synthesize previously published pollen records and biome reconstructions and perform pollen diversity analysis of the deep-drilling core ICDP 5011-1 from Lake El'gygytgyn for periods during the Early Pleistocene (MIS 82 – MIS 79), Early–Middle Pleistocene (MIS 31 – MIS 18) and late Middle Pleistocene (MIS 7e – MIS 6f). The results indicate that the predominance of herb tundra in the regional vegetation was most characteristic during glacials/stadials. Interglacials, in contrast, can be distinguished by the expansion of shrub communities mainly composed of birch, alder and willow. The expansion of forest biomes in the region was influenced by peaks in obliquity values, which led to increases in daylight length, which was essential for plant growth in high latitudes. An apparent long-term decreasing trend in the tree and shrub population, accompanied by a reduction in floristic richness, was induced by stepwise cooling and drying since the Mid-Pleistocene Transition (MPT), which is linked to the modulation of extended global ice volume during the MPT via strong snow- and ice-albedo feedback effects.

Original languageEnglish (US)
Pages (from-to)915-927
Number of pages13
JournalJournal of Quaternary Science
Volume37
Issue number5
DOIs
StatePublished - Jul 2022

Bibliographical note

Funding Information:
The drilling operation at Lake El′gygytgyn was financed by the International Continental Scientific Drilling Program (ICDP), the US National Science Foundation (NSF; grants OPP 007122, 96‐15768 and 0002643), the German Federal Ministry of Education and Research (BMBF; grant 03G0642), Alfred Wegener Institute (AWI) and GeoForschungsZentrum Potsdam (GFZ), the Russian Academy of Sciences Far East Branch (RAS FEB), the Russian Foundation for Basic Research (RFBR), and the Austrian Federal Ministry of Science and Research (BMWF). The Russian GLAD 800 drilling system was developed and operated by DOSECC Inc. LacCore at the University of Minnesota handled core curation. We thank Prof. Yan Zhao for constructive advice on the manuscript. This study was supported by the National Natural Science Foundation of China (grants 42171157 and 41907379), the Education Department of Jiangsu Province (grants 18KJB170020 and 19KJB170026), the Jiangsu Shuangchuang Project (grants 06141008 and 06141009), and the PLOT projects of the German BMBF (grants 03G0859A and 03F0830A). The work of A. Andreev was also partly supported by the Russian Science Foundation (grant 20‐17‐00135). We thank the editor, Chronis Tzedakis, and other two anonymous reviewers for their constructive comments and suggestions.

Funding Information:
The drilling operation at Lake El′gygytgyn was financed by the International Continental Scientific Drilling Program (ICDP), the US National Science Foundation (NSF; grants OPP 007122, 96-15768 and 0002643), the German Federal Ministry of Education and Research (BMBF; grant 03G0642), Alfred Wegener Institute (AWI) and GeoForschungsZentrum Potsdam (GFZ), the Russian Academy of Sciences Far East Branch (RAS FEB), the Russian Foundation for Basic Research (RFBR), and the Austrian Federal Ministry of Science and Research (BMWF). The Russian GLAD 800 drilling system was developed and operated by DOSECC Inc. LacCore at the University of Minnesota handled core curation. We thank Prof. Yan Zhao for constructive advice on the manuscript. This study was supported by the National Natural Science Foundation of China (grants 42171157 and 41907379), the Education Department of Jiangsu Province (grants 18KJB170020 and 19KJB170026), the Jiangsu Shuangchuang Project (grants 06141008 and 06141009), and the PLOT projects of the German BMBF (grants 03G0859A and 03F0830A). The work of A. Andreev was also partly supported by the Russian Science Foundation (grant 20-17-00135). We thank the editor, Chronis Tzedakis, and other two anonymous reviewers for their constructive comments and suggestions.

Publisher Copyright:
© 2022 John Wiley & Sons, Ltd.

Continental Scientific Drilling Facility tags

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