Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise
8 pages, 5 figures, supporting information https://doi.org/10.1038/s41561-019-0473-9.-- All data are archived at the Australian Antarctic Data Centre (https://data.aad.gov.au/) and are publicly accessible at https://doi.org/10.26179/5d5df822acf6c Glacial–interglacial changes in atmospheric CO are ge...
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Online Access: | http://hdl.handle.net/10261/201968 https://doi.org/10.1038/s41561-019-0473-9 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100005108 |
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ftcsic:oai:digital.csic.es:10261/201968 2024-02-11T09:56:30+01:00 Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise Moy, A.D. Palmer, Martin R. Howard, William R. Bijma, Jelle Cooper, Matthew J. Calvo, Eva María Pelejero, Carles Gagan, Michael K. Chalk, Thomas B. Australian Antarctic Division Australian Government Antarctic Climate and Ecosystems Cooperative Research Centre (Australia) European Commission 2019-10 http://hdl.handle.net/10261/201968 https://doi.org/10.1038/s41561-019-0473-9 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100005108 unknown Nature Publishing Group https://doi.org/10.1038/s41561-019-0473-9 Sí doi:10.1038/s41561-019-0473-9 issn: 1752-0894 issn: 1752-0908 Nature Geoscience 12: 1006-1011 (2019) http://hdl.handle.net/10261/201968 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100005108 open artículo http://purl.org/coar/resource_type/c_6501 2019 ftcsic https://doi.org/10.1038/s41561-019-0473-910.13039/50110000078010.13039/501100005108 2024-01-16T10:49:06Z 8 pages, 5 figures, supporting information https://doi.org/10.1038/s41561-019-0473-9.-- All data are archived at the Australian Antarctic Data Centre (https://data.aad.gov.au/) and are publicly accessible at https://doi.org/10.26179/5d5df822acf6c Glacial–interglacial changes in atmospheric CO are generally attributed to changes in seawater carbon chemistry in response to large-scale shifts in the ocean’s biogeochemistry and general circulation. The Southern Ocean currently takes up more CO than any other and it is likely to have played a crucial role in regulating past atmospheric CO. However, the physical, biological and chemical variables that control ocean–atmosphere CO exchange during glacial–interglacial cycles are not completely understood. Here we use boron isotopes and carbon isotopes in planktonic foraminifera and an alkenone-based proxy of temperature to reconstruct seawater pH and CO partial pressure in sub-Antarctic surface waters south of Tasmania over the past 25,000 years, and investigate the mechanisms that regulate seawater CO. The new record shows that surface waters in this region were a sink for atmospheric CO during the Last Glacial Maximum. Our reconstruction suggests changes in the strength of the biological pump and the release of deep-ocean CO to surface waters contributed to the last deglacial rise in atmospheric CO. These findings demonstrate that variations in upwelling intensity and the distribution of Southern Ocean water masses in this sector played a key role in regulating atmospheric CO during the last glacial–interglacial cycle This work was supported by the Australian Antarctic Division (AAS 4061) and the Australian Government’s Cooperative Research Centres Programme through the Antarctic Climate and Ecosystems Cooperative Research Centre (ACE CRC). The boron isotope analyses were supported by the European Union 5th Framework Programme project 6C (Project ID: EVK2-CT-2002-00135 6 C). Article in Journal/Newspaper Antarc* Antarctic Antarctic Climate and Ecosystems Cooperative Research Centre Australian Antarctic Division Planktonic foraminifera Southern Ocean Digital.CSIC (Spanish National Research Council) Antarctic Southern Ocean The Antarctic Nature Geoscience 12 12 1006 1011 |
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8 pages, 5 figures, supporting information https://doi.org/10.1038/s41561-019-0473-9.-- All data are archived at the Australian Antarctic Data Centre (https://data.aad.gov.au/) and are publicly accessible at https://doi.org/10.26179/5d5df822acf6c Glacial–interglacial changes in atmospheric CO are generally attributed to changes in seawater carbon chemistry in response to large-scale shifts in the ocean’s biogeochemistry and general circulation. The Southern Ocean currently takes up more CO than any other and it is likely to have played a crucial role in regulating past atmospheric CO. However, the physical, biological and chemical variables that control ocean–atmosphere CO exchange during glacial–interglacial cycles are not completely understood. Here we use boron isotopes and carbon isotopes in planktonic foraminifera and an alkenone-based proxy of temperature to reconstruct seawater pH and CO partial pressure in sub-Antarctic surface waters south of Tasmania over the past 25,000 years, and investigate the mechanisms that regulate seawater CO. The new record shows that surface waters in this region were a sink for atmospheric CO during the Last Glacial Maximum. Our reconstruction suggests changes in the strength of the biological pump and the release of deep-ocean CO to surface waters contributed to the last deglacial rise in atmospheric CO. These findings demonstrate that variations in upwelling intensity and the distribution of Southern Ocean water masses in this sector played a key role in regulating atmospheric CO during the last glacial–interglacial cycle This work was supported by the Australian Antarctic Division (AAS 4061) and the Australian Government’s Cooperative Research Centres Programme through the Antarctic Climate and Ecosystems Cooperative Research Centre (ACE CRC). The boron isotope analyses were supported by the European Union 5th Framework Programme project 6C (Project ID: EVK2-CT-2002-00135 6 C). |
author2 |
Australian Antarctic Division Australian Government Antarctic Climate and Ecosystems Cooperative Research Centre (Australia) European Commission |
format |
Article in Journal/Newspaper |
author |
Moy, A.D. Palmer, Martin R. Howard, William R. Bijma, Jelle Cooper, Matthew J. Calvo, Eva María Pelejero, Carles Gagan, Michael K. Chalk, Thomas B. |
spellingShingle |
Moy, A.D. Palmer, Martin R. Howard, William R. Bijma, Jelle Cooper, Matthew J. Calvo, Eva María Pelejero, Carles Gagan, Michael K. Chalk, Thomas B. Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise |
author_facet |
Moy, A.D. Palmer, Martin R. Howard, William R. Bijma, Jelle Cooper, Matthew J. Calvo, Eva María Pelejero, Carles Gagan, Michael K. Chalk, Thomas B. |
author_sort |
Moy, A.D. |
title |
Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise |
title_short |
Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise |
title_full |
Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise |
title_fullStr |
Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise |
title_full_unstemmed |
Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise |
title_sort |
varied contribution of the southern ocean to deglacial atmospheric co2 rise |
publisher |
Nature Publishing Group |
publishDate |
2019 |
url |
http://hdl.handle.net/10261/201968 https://doi.org/10.1038/s41561-019-0473-9 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100005108 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Climate and Ecosystems Cooperative Research Centre Australian Antarctic Division Planktonic foraminifera Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Climate and Ecosystems Cooperative Research Centre Australian Antarctic Division Planktonic foraminifera Southern Ocean |
op_relation |
https://doi.org/10.1038/s41561-019-0473-9 Sí doi:10.1038/s41561-019-0473-9 issn: 1752-0894 issn: 1752-0908 Nature Geoscience 12: 1006-1011 (2019) http://hdl.handle.net/10261/201968 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100005108 |
op_rights |
open |
op_doi |
https://doi.org/10.1038/s41561-019-0473-910.13039/50110000078010.13039/501100005108 |
container_title |
Nature Geoscience |
container_volume |
12 |
container_issue |
12 |
container_start_page |
1006 |
op_container_end_page |
1011 |
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1790603575084187648 |