Palaeoceanography: Antarctic stratification and glacial CO2
One way of accounting for lowered atmospheric carbon dioxide concentrations during Pleistocene glacial periods is by invoking the Antarctic stratification hypothesis, which links the reduction in CO2 to greater stratification of ocean surface waters around Antarctica1, 2. As discussed by Sigman and...
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ftoceanrep:oai:oceanrep.geomar.de:1004 2024-09-30T14:26:38+00:00 Palaeoceanography: Antarctic stratification and glacial CO2 Keeling, R. F. Visbeck, Martin 2001 text https://oceanrep.geomar.de/id/eprint/1004/ https://oceanrep.geomar.de/id/eprint/1004/1/Keeling.pdf https://doi.org/10.1038/35088129 en eng Nature Publishing Group https://oceanrep.geomar.de/id/eprint/1004/1/Keeling.pdf Keeling, R. F. and Visbeck, M. (2001) Palaeoceanography: Antarctic stratification and glacial CO2. Nature, 412 . pp. 605-606. DOI 10.1038/35088129 <https://doi.org/10.1038/35088129>. doi:10.1038/35088129 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2001 ftoceanrep https://doi.org/10.1038/35088129 2024-09-04T05:04:40Z One way of accounting for lowered atmospheric carbon dioxide concentrations during Pleistocene glacial periods is by invoking the Antarctic stratification hypothesis, which links the reduction in CO2 to greater stratification of ocean surface waters around Antarctica1, 2. As discussed by Sigman and Boyle3, this hypothesis assumes that increased stratification in the Antarctic zone (Fig. 1) was associated with reduced upwelling of deep waters around Antarctica, thereby allowing CO2 outgassing to be suppressed by biological production while also allowing biological production to decline, which is consistent with Antarctic sediment records4. We point out here, however, that the response of ocean eddies to increased Antarctic stratification can be expected to increase, rather than reduce, the upwelling rate of deep waters around Antarctica. The stratification hypothesis may have difficulty in accommodating eddy feedbacks on upwelling within the constraints imposed by reconstructions of winds and Antarctic-zone productivity in glacial periods. Article in Journal/Newspaper Antarc* Antarctic Antarctica OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic The Antarctic Nature 412 6847 605 606 |
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English |
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One way of accounting for lowered atmospheric carbon dioxide concentrations during Pleistocene glacial periods is by invoking the Antarctic stratification hypothesis, which links the reduction in CO2 to greater stratification of ocean surface waters around Antarctica1, 2. As discussed by Sigman and Boyle3, this hypothesis assumes that increased stratification in the Antarctic zone (Fig. 1) was associated with reduced upwelling of deep waters around Antarctica, thereby allowing CO2 outgassing to be suppressed by biological production while also allowing biological production to decline, which is consistent with Antarctic sediment records4. We point out here, however, that the response of ocean eddies to increased Antarctic stratification can be expected to increase, rather than reduce, the upwelling rate of deep waters around Antarctica. The stratification hypothesis may have difficulty in accommodating eddy feedbacks on upwelling within the constraints imposed by reconstructions of winds and Antarctic-zone productivity in glacial periods. |
format |
Article in Journal/Newspaper |
author |
Keeling, R. F. Visbeck, Martin |
spellingShingle |
Keeling, R. F. Visbeck, Martin Palaeoceanography: Antarctic stratification and glacial CO2 |
author_facet |
Keeling, R. F. Visbeck, Martin |
author_sort |
Keeling, R. F. |
title |
Palaeoceanography: Antarctic stratification and glacial CO2 |
title_short |
Palaeoceanography: Antarctic stratification and glacial CO2 |
title_full |
Palaeoceanography: Antarctic stratification and glacial CO2 |
title_fullStr |
Palaeoceanography: Antarctic stratification and glacial CO2 |
title_full_unstemmed |
Palaeoceanography: Antarctic stratification and glacial CO2 |
title_sort |
palaeoceanography: antarctic stratification and glacial co2 |
publisher |
Nature Publishing Group |
publishDate |
2001 |
url |
https://oceanrep.geomar.de/id/eprint/1004/ https://oceanrep.geomar.de/id/eprint/1004/1/Keeling.pdf https://doi.org/10.1038/35088129 |
geographic |
Antarctic The Antarctic |
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Antarctic The Antarctic |
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Antarc* Antarctic Antarctica |
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Antarc* Antarctic Antarctica |
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https://oceanrep.geomar.de/id/eprint/1004/1/Keeling.pdf Keeling, R. F. and Visbeck, M. (2001) Palaeoceanography: Antarctic stratification and glacial CO2. Nature, 412 . pp. 605-606. DOI 10.1038/35088129 <https://doi.org/10.1038/35088129>. doi:10.1038/35088129 |
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info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1038/35088129 |
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Nature |
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412 |
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6847 |
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