Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific
Although the Pacific Ocean is a major reservoir of heat and CO 2 , and thus an important component of the global climate system, its circulation under different climatic conditions is poorly understood. Here, we present evidence that during the Last Glacial Maximum (LGM), the North Pacific was bette...
Published in: | Science Advances |
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2020
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/overturning-circulation-nutrient-limitation-and-warming-in-the-glacial-north-pacific(0fc76b39-de1c-4820-920f-5c2fade983e9).html https://doi.org/10.1126/sciadv.abd1654 https://research-repository.st-andrews.ac.uk/bitstream/10023/21128/1/Rae_2020_SciAdvances_overturning_circulation_CC.pdf https://advances.sciencemag.org/content/6/50/eabd1654/tab-figures-data |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/0fc76b39-de1c-4820-920f-5c2fade983e9 2024-09-15T18:37:10+00:00 Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific Rae, James W. B. Gray, W. R. Wills, R. C. J. Eisenman, I. Fitzhugh, B. Fotheringham, M. Littley, Eloise Rafter, P. A. Rees-Owen, Rhian Laura Ridgwell, A. Taylor, Ben Burke, Andrea 2020-12-09 application/pdf https://research-portal.st-andrews.ac.uk/en/researchoutput/overturning-circulation-nutrient-limitation-and-warming-in-the-glacial-north-pacific(0fc76b39-de1c-4820-920f-5c2fade983e9).html https://doi.org/10.1126/sciadv.abd1654 https://research-repository.st-andrews.ac.uk/bitstream/10023/21128/1/Rae_2020_SciAdvances_overturning_circulation_CC.pdf https://advances.sciencemag.org/content/6/50/eabd1654/tab-figures-data eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/overturning-circulation-nutrient-limitation-and-warming-in-the-glacial-north-pacific(0fc76b39-de1c-4820-920f-5c2fade983e9).html info:eu-repo/semantics/openAccess Rae , J W B , Gray , W R , Wills , R C J , Eisenman , I , Fitzhugh , B , Fotheringham , M , Littley , E , Rafter , P A , Rees-Owen , R L , Ridgwell , A , Taylor , B & Burke , A 2020 , ' Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific ' , Science Advances , vol. 6 , no. 50 , eabd1654 . https://doi.org/10.1126/sciadv.abd1654 article 2020 ftunstandrewcris https://doi.org/10.1126/sciadv.abd1654 2024-07-31T23:33:09Z Although the Pacific Ocean is a major reservoir of heat and CO 2 , and thus an important component of the global climate system, its circulation under different climatic conditions is poorly understood. Here, we present evidence that during the Last Glacial Maximum (LGM), the North Pacific was better ventilated at intermediate depths and had surface waters with lower nutrients, higher salinity, and warmer temperatures compared to today. Modeling shows that this pattern is well explained by enhanced Pacific meridional overturning circulation (PMOC), which brings warm, salty, and nutrient-poor subtropical waters to high latitudes. Enhanced PMOC at the LGM would have lowered atmospheric CO 2 —in part through synergy with the Southern Ocean—and supported an equable regional climate, which may have aided human habitability in Beringia, and migration from Asia to North America. Article in Journal/Newspaper Southern Ocean Beringia University of St Andrews: Research Portal Science Advances 6 50 |
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Open Polar |
collection |
University of St Andrews: Research Portal |
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ftunstandrewcris |
language |
English |
description |
Although the Pacific Ocean is a major reservoir of heat and CO 2 , and thus an important component of the global climate system, its circulation under different climatic conditions is poorly understood. Here, we present evidence that during the Last Glacial Maximum (LGM), the North Pacific was better ventilated at intermediate depths and had surface waters with lower nutrients, higher salinity, and warmer temperatures compared to today. Modeling shows that this pattern is well explained by enhanced Pacific meridional overturning circulation (PMOC), which brings warm, salty, and nutrient-poor subtropical waters to high latitudes. Enhanced PMOC at the LGM would have lowered atmospheric CO 2 —in part through synergy with the Southern Ocean—and supported an equable regional climate, which may have aided human habitability in Beringia, and migration from Asia to North America. |
format |
Article in Journal/Newspaper |
author |
Rae, James W. B. Gray, W. R. Wills, R. C. J. Eisenman, I. Fitzhugh, B. Fotheringham, M. Littley, Eloise Rafter, P. A. Rees-Owen, Rhian Laura Ridgwell, A. Taylor, Ben Burke, Andrea |
spellingShingle |
Rae, James W. B. Gray, W. R. Wills, R. C. J. Eisenman, I. Fitzhugh, B. Fotheringham, M. Littley, Eloise Rafter, P. A. Rees-Owen, Rhian Laura Ridgwell, A. Taylor, Ben Burke, Andrea Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific |
author_facet |
Rae, James W. B. Gray, W. R. Wills, R. C. J. Eisenman, I. Fitzhugh, B. Fotheringham, M. Littley, Eloise Rafter, P. A. Rees-Owen, Rhian Laura Ridgwell, A. Taylor, Ben Burke, Andrea |
author_sort |
Rae, James W. B. |
title |
Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific |
title_short |
Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific |
title_full |
Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific |
title_fullStr |
Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific |
title_full_unstemmed |
Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific |
title_sort |
overturning circulation, nutrient limitation, and warming in the glacial north pacific |
publishDate |
2020 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/overturning-circulation-nutrient-limitation-and-warming-in-the-glacial-north-pacific(0fc76b39-de1c-4820-920f-5c2fade983e9).html https://doi.org/10.1126/sciadv.abd1654 https://research-repository.st-andrews.ac.uk/bitstream/10023/21128/1/Rae_2020_SciAdvances_overturning_circulation_CC.pdf https://advances.sciencemag.org/content/6/50/eabd1654/tab-figures-data |
genre |
Southern Ocean Beringia |
genre_facet |
Southern Ocean Beringia |
op_source |
Rae , J W B , Gray , W R , Wills , R C J , Eisenman , I , Fitzhugh , B , Fotheringham , M , Littley , E , Rafter , P A , Rees-Owen , R L , Ridgwell , A , Taylor , B & Burke , A 2020 , ' Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific ' , Science Advances , vol. 6 , no. 50 , eabd1654 . https://doi.org/10.1126/sciadv.abd1654 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/overturning-circulation-nutrient-limitation-and-warming-in-the-glacial-north-pacific(0fc76b39-de1c-4820-920f-5c2fade983e9).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1126/sciadv.abd1654 |
container_title |
Science Advances |
container_volume |
6 |
container_issue |
50 |
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1810481512790884352 |