Global oceanic oxygenation controlled by the Southern Ocean through the last deglaciation
Ocean dissolved oxygen (DO) can provide insights on how the marine carbon cycle affects global climate change. However, the net global DO change and the controlling mechanisms remain uncertain through the last deglaciation. Here, we present a globally integrated DO reconstruction using thallium isot...
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Online Access: | http://dx.doi.org/10.1126/sciadv.adk2506 https://www.science.org/doi/pdf/10.1126/sciadv.adk2506 |
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craaas:10.1126/sciadv.adk2506 2024-06-09T07:47:56+00:00 Global oceanic oxygenation controlled by the Southern Ocean through the last deglaciation Wang, Yi Costa, Kassandra M. Lu, Wanyi Hines, Sophia K. V. Nielsen, Sune G. 2024 http://dx.doi.org/10.1126/sciadv.adk2506 https://www.science.org/doi/pdf/10.1126/sciadv.adk2506 en eng American Association for the Advancement of Science (AAAS) Science Advances volume 10, issue 3 ISSN 2375-2548 journal-article 2024 craaas https://doi.org/10.1126/sciadv.adk2506 2024-05-16T12:54:19Z Ocean dissolved oxygen (DO) can provide insights on how the marine carbon cycle affects global climate change. However, the net global DO change and the controlling mechanisms remain uncertain through the last deglaciation. Here, we present a globally integrated DO reconstruction using thallium isotopes, corroborating lower global DO during the Last Glacial Maximum [19 to 23 thousand years before the present (ka B.P.)] relative to the Holocene. During the deglaciation, we reveal reoxygenation in the Heinrich Stadial 1 (~14.7 to 18 ka B.P.) and the Younger Dryas (11.7 to 12.9 ka B.P.), with deoxygenation during the Bølling-Allerød (12.9 to 14.7 ka B.P.). The deglacial DO changes were decoupled from North Atlantic Deep Water formation rates and imply that Southern Ocean ventilation controlled ocean oxygen. The coherence between global DO and atmospheric CO 2 on millennial timescales highlights the Southern Ocean’s role in deglacial atmospheric CO 2 rise. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic Southern Ocean AAAS Resource Center (American Association for the Advancement of Science) Southern Ocean Science Advances 10 3 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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English |
description |
Ocean dissolved oxygen (DO) can provide insights on how the marine carbon cycle affects global climate change. However, the net global DO change and the controlling mechanisms remain uncertain through the last deglaciation. Here, we present a globally integrated DO reconstruction using thallium isotopes, corroborating lower global DO during the Last Glacial Maximum [19 to 23 thousand years before the present (ka B.P.)] relative to the Holocene. During the deglaciation, we reveal reoxygenation in the Heinrich Stadial 1 (~14.7 to 18 ka B.P.) and the Younger Dryas (11.7 to 12.9 ka B.P.), with deoxygenation during the Bølling-Allerød (12.9 to 14.7 ka B.P.). The deglacial DO changes were decoupled from North Atlantic Deep Water formation rates and imply that Southern Ocean ventilation controlled ocean oxygen. The coherence between global DO and atmospheric CO 2 on millennial timescales highlights the Southern Ocean’s role in deglacial atmospheric CO 2 rise. |
format |
Article in Journal/Newspaper |
author |
Wang, Yi Costa, Kassandra M. Lu, Wanyi Hines, Sophia K. V. Nielsen, Sune G. |
spellingShingle |
Wang, Yi Costa, Kassandra M. Lu, Wanyi Hines, Sophia K. V. Nielsen, Sune G. Global oceanic oxygenation controlled by the Southern Ocean through the last deglaciation |
author_facet |
Wang, Yi Costa, Kassandra M. Lu, Wanyi Hines, Sophia K. V. Nielsen, Sune G. |
author_sort |
Wang, Yi |
title |
Global oceanic oxygenation controlled by the Southern Ocean through the last deglaciation |
title_short |
Global oceanic oxygenation controlled by the Southern Ocean through the last deglaciation |
title_full |
Global oceanic oxygenation controlled by the Southern Ocean through the last deglaciation |
title_fullStr |
Global oceanic oxygenation controlled by the Southern Ocean through the last deglaciation |
title_full_unstemmed |
Global oceanic oxygenation controlled by the Southern Ocean through the last deglaciation |
title_sort |
global oceanic oxygenation controlled by the southern ocean through the last deglaciation |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2024 |
url |
http://dx.doi.org/10.1126/sciadv.adk2506 https://www.science.org/doi/pdf/10.1126/sciadv.adk2506 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
Science Advances volume 10, issue 3 ISSN 2375-2548 |
op_doi |
https://doi.org/10.1126/sciadv.adk2506 |
container_title |
Science Advances |
container_volume |
10 |
container_issue |
3 |
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1801379419963523072 |