Closure of the Bering Strait caused Mid-Pleistocene Transition cooling
The Mid-Pleistocene Transition (MPT) is characterised by cooling and lengthening glacial cycles from 600–1200 ka, thought to be driven by reductions in glacial CO2 in particular from ~900 ka onwards. Reduced high latitude upwelling, a process that retains CO2 within the deep ocean over glacials, cou...
Published in: | Nature Communications |
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2018
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Online Access: | https://pure.au.dk/portal/da/publications/closure-of-the-bering-strait-caused-midpleistocene-transition-cooling(de392622-eafb-4310-8382-8df2fcd9caa3).html https://doi.org/10.1038/s41467-018-07828-0 https://pure.au.dk/ws/files/140321567/s41467_018_07828_0.pdf |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/de392622-eafb-4310-8382-8df2fcd9caa3 2023-10-09T21:50:20+02:00 Closure of the Bering Strait caused Mid-Pleistocene Transition cooling Kender, Sev Ravelo, Ana Christina Worne, Savannah Swann, George E. A. Leng, Melanie J. Asahi, Hirofumi Becker, Julia Detlef, Henrieka Aiello, Ivano W. Andreasen, Dyke Hall, Ian R. 2018 application/pdf https://pure.au.dk/portal/da/publications/closure-of-the-bering-strait-caused-midpleistocene-transition-cooling(de392622-eafb-4310-8382-8df2fcd9caa3).html https://doi.org/10.1038/s41467-018-07828-0 https://pure.au.dk/ws/files/140321567/s41467_018_07828_0.pdf eng eng info:eu-repo/semantics/openAccess Kender , S , Ravelo , A C , Worne , S , Swann , G E A , Leng , M J , Asahi , H , Becker , J , Detlef , H , Aiello , I W , Andreasen , D & Hall , I R 2018 , ' Closure of the Bering Strait caused Mid-Pleistocene Transition cooling ' , Nature Communications , vol. 9 , no. 1 , 5386 . https://doi.org/10.1038/s41467-018-07828-0 article 2018 ftuniaarhuspubl https://doi.org/10.1038/s41467-018-07828-0 2023-09-20T22:58:33Z The Mid-Pleistocene Transition (MPT) is characterised by cooling and lengthening glacial cycles from 600–1200 ka, thought to be driven by reductions in glacial CO2 in particular from ~900 ka onwards. Reduced high latitude upwelling, a process that retains CO2 within the deep ocean over glacials, could have aided drawdown but has so far not been constrained in either hemisphere over the MPT. Here, we find that reduced nutrient upwelling in the Bering Sea, and North Pacific Intermediate Water expansion, coincided with the MPT and became more persistent at ~900 ka. We propose reduced upwelling was controlled by expanding sea ice and North Pacific Intermediate Water formation, which may have been enhanced by closure of the Bering Strait. The regional extent of North Pacific Intermediate Water across the subarctic northwest Pacific would have contributed to lower atmospheric CO2 and global cooling during the MPT. Article in Journal/Newspaper Bering Sea Bering Strait Sea ice Subarctic Aarhus University: Research Bering Sea Bering Strait Pacific Nature Communications 9 1 |
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Open Polar |
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Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
The Mid-Pleistocene Transition (MPT) is characterised by cooling and lengthening glacial cycles from 600–1200 ka, thought to be driven by reductions in glacial CO2 in particular from ~900 ka onwards. Reduced high latitude upwelling, a process that retains CO2 within the deep ocean over glacials, could have aided drawdown but has so far not been constrained in either hemisphere over the MPT. Here, we find that reduced nutrient upwelling in the Bering Sea, and North Pacific Intermediate Water expansion, coincided with the MPT and became more persistent at ~900 ka. We propose reduced upwelling was controlled by expanding sea ice and North Pacific Intermediate Water formation, which may have been enhanced by closure of the Bering Strait. The regional extent of North Pacific Intermediate Water across the subarctic northwest Pacific would have contributed to lower atmospheric CO2 and global cooling during the MPT. |
format |
Article in Journal/Newspaper |
author |
Kender, Sev Ravelo, Ana Christina Worne, Savannah Swann, George E. A. Leng, Melanie J. Asahi, Hirofumi Becker, Julia Detlef, Henrieka Aiello, Ivano W. Andreasen, Dyke Hall, Ian R. |
spellingShingle |
Kender, Sev Ravelo, Ana Christina Worne, Savannah Swann, George E. A. Leng, Melanie J. Asahi, Hirofumi Becker, Julia Detlef, Henrieka Aiello, Ivano W. Andreasen, Dyke Hall, Ian R. Closure of the Bering Strait caused Mid-Pleistocene Transition cooling |
author_facet |
Kender, Sev Ravelo, Ana Christina Worne, Savannah Swann, George E. A. Leng, Melanie J. Asahi, Hirofumi Becker, Julia Detlef, Henrieka Aiello, Ivano W. Andreasen, Dyke Hall, Ian R. |
author_sort |
Kender, Sev |
title |
Closure of the Bering Strait caused Mid-Pleistocene Transition cooling |
title_short |
Closure of the Bering Strait caused Mid-Pleistocene Transition cooling |
title_full |
Closure of the Bering Strait caused Mid-Pleistocene Transition cooling |
title_fullStr |
Closure of the Bering Strait caused Mid-Pleistocene Transition cooling |
title_full_unstemmed |
Closure of the Bering Strait caused Mid-Pleistocene Transition cooling |
title_sort |
closure of the bering strait caused mid-pleistocene transition cooling |
publishDate |
2018 |
url |
https://pure.au.dk/portal/da/publications/closure-of-the-bering-strait-caused-midpleistocene-transition-cooling(de392622-eafb-4310-8382-8df2fcd9caa3).html https://doi.org/10.1038/s41467-018-07828-0 https://pure.au.dk/ws/files/140321567/s41467_018_07828_0.pdf |
geographic |
Bering Sea Bering Strait Pacific |
geographic_facet |
Bering Sea Bering Strait Pacific |
genre |
Bering Sea Bering Strait Sea ice Subarctic |
genre_facet |
Bering Sea Bering Strait Sea ice Subarctic |
op_source |
Kender , S , Ravelo , A C , Worne , S , Swann , G E A , Leng , M J , Asahi , H , Becker , J , Detlef , H , Aiello , I W , Andreasen , D & Hall , I R 2018 , ' Closure of the Bering Strait caused Mid-Pleistocene Transition cooling ' , Nature Communications , vol. 9 , no. 1 , 5386 . https://doi.org/10.1038/s41467-018-07828-0 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-018-07828-0 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
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1779313383482327040 |