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Lagged atmospheric ...
Lagged atmospheric circulation response in the Black Sea region to Greenland Interstadial 10
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- Czymzik, Markus (författare)
- Leibniz Institute for Baltic Sea Research Wardemünde
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- Nowaczyk, Norbert R. (författare)
- GFZ German Research Centre for Geosciences
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- Dellwig, Olaf (författare)
- Leibniz Institute for Baltic Sea Research Wardemünde
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- Wegwerth, Antje (författare)
- Leibniz Institute for Baltic Sea Research Wardemünde
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- Muscheler, Raimund (författare)
- Lund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kvartärgeologi,Geologiska institutionen,Centre for Environmental and Climate Science (CEC),Faculty of Science,Quaternary Sciences,Department of Geology
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- Christl, Marcus (författare)
- ETH Zürich
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- Arz, Helge W. (författare)
- Leibniz Institute for Baltic Sea Research Wardemünde
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(creator_code:org_t)
- 2020-11-02
- 2020
- Engelska 6 s.
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Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 1091-6490. ; 117:46, s. 28649-28654
- Relaterad länk:
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http://dx.doi.org/10...
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https://www.pnas.org...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Northern Hemispheric high-latitude climate variations during the last glacial are expected to propagate globally in a complex way. Investigating the evolution of these variations requires a precise synchronization of the considered environmental archives. Aligning the globally common production rate variations of the cosmogenic radionuclide 10Be in different archives provides a tool for such synchronizations. Here, we present a 10Be record at <40-y resolution along with subdecadal proxy records from one Black Sea sediment core around Greenland Interstadial 10 (GI-10) ∼41 ka BP and the Laschamp geomagnetic excursion. We synchronized our 10Be record to that from Greenland ice cores based on its globally common production rate variations. The synchronized environmental proxy records reveal a bipartite climate response in the Black Sea region at the onset of GI-10. First, in phase with Greenland warming, reduced sedimentary coastal ice rafted detritus contents indicate less severe winters. Second, and with a lag of 190 (± 44) y, an increase in the detrital K/Ti ratio and authigenic Ca precipitation point to enhanced regional precipitation and warmer lake surface temperatures. We explain the lagged climatic response by a shift in the dominant mode of atmospheric circulation, likely connected with a time-transgressive adjustment of the regional thermal ocean interior to interstadial conditions.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Nyckelord
- archive synchronization
- Black Sea sediments
- climate
- cosmogenic radionuclides
- phase relationship
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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