Southern Ocean upwelling, Earth’s obliquity, and glacial-interglacial atmospheric CO2 change
Previous studies have suggested that during the late Pleistocene ice ages, surface-deep exchange was somehow weakened in the Southern Ocean’s Antarctic Zone, which reduced the leakage of deeply sequestered carbon dioxide and thus contributed to the lower atmospheric carbon dioxide levels of the ice...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/315746 2023-05-15T13:54:45+02:00 Southern Ocean upwelling, Earth’s obliquity, and glacial-interglacial atmospheric CO2 change Ai, Xuyuan Studer, Anja S. Sigman, Daniel M. Martínez-García, Alfredo Fripiat, François Thöle, L Michel, Elisabeth Gottschalk, Julia Arnold, Laura Moretti, Simone Schmitt, M. Oleynik, Sergey Jaccard, Samuel L. Haug, Gerald H. 2020-12-01 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/315746 https://dipot.ulb.ac.be/dspace/bitstream/2013/315746/3/abstractAi2020.pdf en eng uri/info:doi/10.1126/science.abd2115 https://dipot.ulb.ac.be/dspace/bitstream/2013/315746/3/abstractAi2020.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/315746 1 full-text file(s): info:eu-repo/semantics/openAccess Science, 370 (6522 Sciences de la terre et du cosmos info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2020 ftunivbruxelles 2022-06-12T22:00:37Z Previous studies have suggested that during the late Pleistocene ice ages, surface-deep exchange was somehow weakened in the Southern Ocean’s Antarctic Zone, which reduced the leakage of deeply sequestered carbon dioxide and thus contributed to the lower atmospheric carbon dioxide levels of the ice ages. Here, high-resolution diatom-bound nitrogen isotope measurements from the Indian sector of the Antarctic Zone reveal three modes of change in Southern Westerly Wind–driven upwelling, each affecting atmospheric carbon dioxide. Two modes, related to global climate and the bipolar seesaw, have been proposed previously. The third mode—which arises from the meridional temperature gradient as affected by Earth’s obliquity (axial tilt)—can explain the lag of atmospheric carbon dioxide behind climate during glacial inception and deglaciation. This obliquity-induced lag, in turn, makes carbon dioxide a delayed climate amplifier in the late Pleistocene glacial cycles. info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Southern Ocean DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic Indian Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences de la terre et du cosmos |
spellingShingle |
Sciences de la terre et du cosmos Ai, Xuyuan Studer, Anja S. Sigman, Daniel M. Martínez-García, Alfredo Fripiat, François Thöle, L Michel, Elisabeth Gottschalk, Julia Arnold, Laura Moretti, Simone Schmitt, M. Oleynik, Sergey Jaccard, Samuel L. Haug, Gerald H. Southern Ocean upwelling, Earth’s obliquity, and glacial-interglacial atmospheric CO2 change |
topic_facet |
Sciences de la terre et du cosmos |
description |
Previous studies have suggested that during the late Pleistocene ice ages, surface-deep exchange was somehow weakened in the Southern Ocean’s Antarctic Zone, which reduced the leakage of deeply sequestered carbon dioxide and thus contributed to the lower atmospheric carbon dioxide levels of the ice ages. Here, high-resolution diatom-bound nitrogen isotope measurements from the Indian sector of the Antarctic Zone reveal three modes of change in Southern Westerly Wind–driven upwelling, each affecting atmospheric carbon dioxide. Two modes, related to global climate and the bipolar seesaw, have been proposed previously. The third mode—which arises from the meridional temperature gradient as affected by Earth’s obliquity (axial tilt)—can explain the lag of atmospheric carbon dioxide behind climate during glacial inception and deglaciation. This obliquity-induced lag, in turn, makes carbon dioxide a delayed climate amplifier in the late Pleistocene glacial cycles. info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Ai, Xuyuan Studer, Anja S. Sigman, Daniel M. Martínez-García, Alfredo Fripiat, François Thöle, L Michel, Elisabeth Gottschalk, Julia Arnold, Laura Moretti, Simone Schmitt, M. Oleynik, Sergey Jaccard, Samuel L. Haug, Gerald H. |
author_facet |
Ai, Xuyuan Studer, Anja S. Sigman, Daniel M. Martínez-García, Alfredo Fripiat, François Thöle, L Michel, Elisabeth Gottschalk, Julia Arnold, Laura Moretti, Simone Schmitt, M. Oleynik, Sergey Jaccard, Samuel L. Haug, Gerald H. |
author_sort |
Ai, Xuyuan |
title |
Southern Ocean upwelling, Earth’s obliquity, and glacial-interglacial atmospheric CO2 change |
title_short |
Southern Ocean upwelling, Earth’s obliquity, and glacial-interglacial atmospheric CO2 change |
title_full |
Southern Ocean upwelling, Earth’s obliquity, and glacial-interglacial atmospheric CO2 change |
title_fullStr |
Southern Ocean upwelling, Earth’s obliquity, and glacial-interglacial atmospheric CO2 change |
title_full_unstemmed |
Southern Ocean upwelling, Earth’s obliquity, and glacial-interglacial atmospheric CO2 change |
title_sort |
southern ocean upwelling, earth’s obliquity, and glacial-interglacial atmospheric co2 change |
publishDate |
2020 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/315746 https://dipot.ulb.ac.be/dspace/bitstream/2013/315746/3/abstractAi2020.pdf |
geographic |
Antarctic Indian Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Science, 370 (6522 |
op_relation |
uri/info:doi/10.1126/science.abd2115 https://dipot.ulb.ac.be/dspace/bitstream/2013/315746/3/abstractAi2020.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/315746 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/openAccess |
_version_ |
1766260861037445120 |