More efficient North Atlantic carbon pump during the Last Glacial Maximum
During the Last Glacial Maximum (LGM; similar to 20,000 years ago), the global ocean sequestered a large amount of carbon lost from the atmosphere and terrestrial biosphere. Suppressed CO2 outgassing from the Southern Ocean is the prevailing explanation for this carbon sequestration. By contrast, th...
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ftchinacascieeca:oai:ir.ieecas.cn:361006/16460 2023-06-11T04:14:15+02:00 More efficient North Atlantic carbon pump during the Last Glacial Maximum Yu, J Menviel, L Jin, Z D Thornalley, D J R Foster, G L Rohling, E J McCave, I N McManus, J F Dai, Y Ren, H He, F Zhang, F Chen, P J Roberts, A P 2019-01-01 http://ir.ieecas.cn/handle/361006/16460 英语 eng NATURE COMMUNICATIONS http://ir.ieecas.cn/handle/361006/16460 期刊论文 2019 ftchinacascieeca 2023-05-08T13:25:16Z During the Last Glacial Maximum (LGM; similar to 20,000 years ago), the global ocean sequestered a large amount of carbon lost from the atmosphere and terrestrial biosphere. Suppressed CO2 outgassing from the Southern Ocean is the prevailing explanation for this carbon sequestration. By contrast, the North Atlantic Ocean-a major conduit for atmospheric CO2 transport to the ocean interior via the overturning circulation-has received much less attention. Here we demonstrate that North Atlantic carbon pump efficiency during the LGM was almost doubled relative to the Holocene. This is based on a novel proxy approach to estimate air-sea CO2 exchange signals using combined carbonate ion and nutrient reconstructions for multiple sediment cores from the North Atlantic. Our data indicate that in tandem with Southern Ocean processes, enhanced North Atlantic CO2 absorption contributed to lowering ice-age atmospheric CO2. Report North Atlantic Southern Ocean Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) Southern Ocean |
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Open Polar |
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Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) |
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ftchinacascieeca |
language |
English |
description |
During the Last Glacial Maximum (LGM; similar to 20,000 years ago), the global ocean sequestered a large amount of carbon lost from the atmosphere and terrestrial biosphere. Suppressed CO2 outgassing from the Southern Ocean is the prevailing explanation for this carbon sequestration. By contrast, the North Atlantic Ocean-a major conduit for atmospheric CO2 transport to the ocean interior via the overturning circulation-has received much less attention. Here we demonstrate that North Atlantic carbon pump efficiency during the LGM was almost doubled relative to the Holocene. This is based on a novel proxy approach to estimate air-sea CO2 exchange signals using combined carbonate ion and nutrient reconstructions for multiple sediment cores from the North Atlantic. Our data indicate that in tandem with Southern Ocean processes, enhanced North Atlantic CO2 absorption contributed to lowering ice-age atmospheric CO2. |
format |
Report |
author |
Yu, J Menviel, L Jin, Z D Thornalley, D J R Foster, G L Rohling, E J McCave, I N McManus, J F Dai, Y Ren, H He, F Zhang, F Chen, P J Roberts, A P |
spellingShingle |
Yu, J Menviel, L Jin, Z D Thornalley, D J R Foster, G L Rohling, E J McCave, I N McManus, J F Dai, Y Ren, H He, F Zhang, F Chen, P J Roberts, A P More efficient North Atlantic carbon pump during the Last Glacial Maximum |
author_facet |
Yu, J Menviel, L Jin, Z D Thornalley, D J R Foster, G L Rohling, E J McCave, I N McManus, J F Dai, Y Ren, H He, F Zhang, F Chen, P J Roberts, A P |
author_sort |
Yu, J |
title |
More efficient North Atlantic carbon pump during the Last Glacial Maximum |
title_short |
More efficient North Atlantic carbon pump during the Last Glacial Maximum |
title_full |
More efficient North Atlantic carbon pump during the Last Glacial Maximum |
title_fullStr |
More efficient North Atlantic carbon pump during the Last Glacial Maximum |
title_full_unstemmed |
More efficient North Atlantic carbon pump during the Last Glacial Maximum |
title_sort |
more efficient north atlantic carbon pump during the last glacial maximum |
publishDate |
2019 |
url |
http://ir.ieecas.cn/handle/361006/16460 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_relation |
NATURE COMMUNICATIONS http://ir.ieecas.cn/handle/361006/16460 |
_version_ |
1768392143673491456 |