Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific.
Although the Pacific Ocean is a major reservoir of heat and CO2, 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...
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ftcdlib:oai:escholarship.org:ark:/13030/qt5670p8kc 2023-05-15T18:25:18+02:00 Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific. Rae, JWB Gray, WR Wills, RCJ Eisenman, I Fitzhugh, B Fotheringham, M Littley, EFM Rafter, PA Rees-Owen, R Ridgwell, A Taylor, B Burke, A eabd1654 2020-12-01 application/pdf https://escholarship.org/uc/item/5670p8kc unknown eScholarship, University of California qt5670p8kc https://escholarship.org/uc/item/5670p8kc public Science advances, vol 6, iss 50 Climate Action article 2020 ftcdlib 2022-08-01T17:30:06Z Although the Pacific Ocean is a major reservoir of heat and CO2, 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 CO2-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 California: eScholarship Pacific Southern Ocean |
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Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action |
spellingShingle |
Climate Action Rae, JWB Gray, WR Wills, RCJ Eisenman, I Fitzhugh, B Fotheringham, M Littley, EFM Rafter, PA Rees-Owen, R Ridgwell, A Taylor, B Burke, A Overturning circulation, nutrient limitation, and warming in the Glacial North Pacific. |
topic_facet |
Climate Action |
description |
Although the Pacific Ocean is a major reservoir of heat and CO2, 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 CO2-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, JWB Gray, WR Wills, RCJ Eisenman, I Fitzhugh, B Fotheringham, M Littley, EFM Rafter, PA Rees-Owen, R Ridgwell, A Taylor, B Burke, A |
author_facet |
Rae, JWB Gray, WR Wills, RCJ Eisenman, I Fitzhugh, B Fotheringham, M Littley, EFM Rafter, PA Rees-Owen, R Ridgwell, A Taylor, B Burke, A |
author_sort |
Rae, JWB |
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. |
publisher |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/5670p8kc |
op_coverage |
eabd1654 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean Beringia |
genre_facet |
Southern Ocean Beringia |
op_source |
Science advances, vol 6, iss 50 |
op_relation |
qt5670p8kc https://escholarship.org/uc/item/5670p8kc |
op_rights |
public |
_version_ |
1766206643078430720 |