Science DOI: 10.1126/science.1222135
- RESEARCH ARTICLE
2.8 Million Years of Arctic Climate Change from Lake El’gygytgyn, NE Russia
- Martin Melles1,*,
- Julie Brigham-Grette2,
- Pavel S. Minyuk3,
- Norbert R. Nowaczyk4,
- Volker Wennrich1,
- Robert M. DeConto2,
- Patricia M. Anderson5,
- Andrei A. Andreev1,
- Anthony Coletti2,
- Timothy L. Cook2,†,
- Eeva Haltia-Hovi4,‡,
- Maaret Kukkonen1,
- Anatoli V. Lozhkin3,
- Peter Rosén6,
- Pavel Tarasov7,
- Hendrik Vogel1,
- Bernd Wagner1
- 1Institute of Geology and Mineralogy, University of Cologne, Zuelpicher Str. 49a, D-50674 Cologne, Germany.
- 2Department of Geosciences, University of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003, USA.
- 3Far East Branch Russian Academy of Sciences, North-East Interdisciplinary Scientific Research Institute, 16 Portovaya St., 685000, Magadan, Russia.
- 4Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg C321, D-14473 Potsdam, Germany.
- 5Earth & Space Sciences, University of Washington, Box 351310, Seattle, WA 98195–1310, USA.
- 6Climate Impacts Research Centre, Umeå University, SE-981 07 Abisko, Sweden.
- 7Institute of Geological Sciences, Free University Berlin, Malteserstr. 74-100, Haus D, D-12249 Berlin, Germany.
- ↵*To whom correspondence should be addressed. E-mail: email@example.com
The reliability of Arctic climate predictions is currently hampered by insufficient knowledge of natural climate variability in the past. A sediment core from Lake El’gygytgyn (NE Russia) provides a continuous high-resolution record from the Arctic spanning the past 2.8 Ma. The core reveals numerous “super interglacials” during the Quaternary, with maximum summer temperatures and annual precipitation during marine benthic isotope stages (MIS) 11c and 31 ~4-5°C and ~300 mm higher than those of MIS 1 and 5e. Climate simulations show these extreme warm conditions are difficult to explain with greenhouse gas and astronomical forcing alone, implying the importance of amplifying feedbacks and far field influences. The timing of Arctic warming relative to West Antarctic Ice Sheet retreats implies strong interhemispheric climate connectivity.
|Graph I shows a blowup of the temperature reconstruction with temps up to 6C higher than modern. The 8 pink vertical lines indicate "super interglacials" over the 2.8 million year record.|
Related: Andy Revkin's twitter:
Siberian lake core reveals past warm Arctic "superinteglacials"with no clear CO2 kick, possible link to Antarctic ice. [Q: why is Revkin standing on solid ice as far as the eye can see with a sign saying "The North Pole
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