The southward migration of the Antarctic Circumpolar Current enhanced oceanic degassing of carbon dioxide during the last two deglaciations
International audience Previous studies suggest that meridional migrations of the Antarctic Circumpolar Current may have altered wind-driven upwelling and carbon dioxide degassing in the Southern Ocean during past climate transitions. Here, we report a quantitative and continuous record of the Antar...
Published in: | Communications Earth & Environment |
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ftuniparissaclay:oai:HAL:hal-04426496v1 2024-04-28T07:59:51+00:00 The southward migration of the Antarctic Circumpolar Current enhanced oceanic degassing of carbon dioxide during the last two deglaciations Ai, Xuyuan, E Auderset, Alexandra Schmitt, Mareike Moretti, Simone Studer, Anja, S Michel, Elisabeth Wegmann, Martin Mazaud, Alain Bijl, Peter, K Sigman, Daniel, M Martínez-García, Alfredo Jaccard, Samuel, L Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Climat et Magnétisme (CLIMAG) 2024-01-30 https://hal.science/hal-04426496 https://hal.science/hal-04426496/document https://hal.science/hal-04426496/file/s43247-024-01216-x.pdf https://doi.org/10.1038/s43247-024-01216-x en eng HAL CCSD Springer Nature info:eu-repo/semantics/altIdentifier/doi/10.1038/s43247-024-01216-x hal-04426496 https://hal.science/hal-04426496 https://hal.science/hal-04426496/document https://hal.science/hal-04426496/file/s43247-024-01216-x.pdf doi:10.1038/s43247-024-01216-x info:eu-repo/semantics/OpenAccess ISSN: 2662-4435 Communications Earth & Environment https://hal.science/hal-04426496 Communications Earth & Environment, 2024, 5 (1), pp.58. ⟨10.1038/s43247-024-01216-x⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2024 ftuniparissaclay https://doi.org/10.1038/s43247-024-01216-x 2024-04-08T17:25:58Z International audience Previous studies suggest that meridional migrations of the Antarctic Circumpolar Current may have altered wind-driven upwelling and carbon dioxide degassing in the Southern Ocean during past climate transitions. Here, we report a quantitative and continuous record of the Antarctic Circumpolar Current latitude over the last glacial-interglacial cycle, using biomarker-based reconstructions of surface layer temperature gradient in the southern Indian Ocean. The results show that the Antarctic Circumpolar Current was more equatorward during the ice ages and shifted ~6°poleward at the end of glacial terminations, consistent with Antarctic Circumpolar Current migration playing a role in glacial-interglacial atmospheric carbon dioxide change. Comparing the temporal evolution of the Antarctic Circumpolar Current mean latitude with other observations provides evidence that Earth's axial tilt affects the strength and latitude range of Southern Ocean wind-driven upwelling, which may explain previously noted deviations in atmospheric carbon dioxide concentration from a simple correlation with Antarctic climate. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Archives ouvertes de Paris-Saclay Communications Earth & Environment 5 1 |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Ai, Xuyuan, E Auderset, Alexandra Schmitt, Mareike Moretti, Simone Studer, Anja, S Michel, Elisabeth Wegmann, Martin Mazaud, Alain Bijl, Peter, K Sigman, Daniel, M Martínez-García, Alfredo Jaccard, Samuel, L The southward migration of the Antarctic Circumpolar Current enhanced oceanic degassing of carbon dioxide during the last two deglaciations |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Previous studies suggest that meridional migrations of the Antarctic Circumpolar Current may have altered wind-driven upwelling and carbon dioxide degassing in the Southern Ocean during past climate transitions. Here, we report a quantitative and continuous record of the Antarctic Circumpolar Current latitude over the last glacial-interglacial cycle, using biomarker-based reconstructions of surface layer temperature gradient in the southern Indian Ocean. The results show that the Antarctic Circumpolar Current was more equatorward during the ice ages and shifted ~6°poleward at the end of glacial terminations, consistent with Antarctic Circumpolar Current migration playing a role in glacial-interglacial atmospheric carbon dioxide change. Comparing the temporal evolution of the Antarctic Circumpolar Current mean latitude with other observations provides evidence that Earth's axial tilt affects the strength and latitude range of Southern Ocean wind-driven upwelling, which may explain previously noted deviations in atmospheric carbon dioxide concentration from a simple correlation with Antarctic climate. |
author2 |
Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Climat et Magnétisme (CLIMAG) |
format |
Article in Journal/Newspaper |
author |
Ai, Xuyuan, E Auderset, Alexandra Schmitt, Mareike Moretti, Simone Studer, Anja, S Michel, Elisabeth Wegmann, Martin Mazaud, Alain Bijl, Peter, K Sigman, Daniel, M Martínez-García, Alfredo Jaccard, Samuel, L |
author_facet |
Ai, Xuyuan, E Auderset, Alexandra Schmitt, Mareike Moretti, Simone Studer, Anja, S Michel, Elisabeth Wegmann, Martin Mazaud, Alain Bijl, Peter, K Sigman, Daniel, M Martínez-García, Alfredo Jaccard, Samuel, L |
author_sort |
Ai, Xuyuan, E |
title |
The southward migration of the Antarctic Circumpolar Current enhanced oceanic degassing of carbon dioxide during the last two deglaciations |
title_short |
The southward migration of the Antarctic Circumpolar Current enhanced oceanic degassing of carbon dioxide during the last two deglaciations |
title_full |
The southward migration of the Antarctic Circumpolar Current enhanced oceanic degassing of carbon dioxide during the last two deglaciations |
title_fullStr |
The southward migration of the Antarctic Circumpolar Current enhanced oceanic degassing of carbon dioxide during the last two deglaciations |
title_full_unstemmed |
The southward migration of the Antarctic Circumpolar Current enhanced oceanic degassing of carbon dioxide during the last two deglaciations |
title_sort |
southward migration of the antarctic circumpolar current enhanced oceanic degassing of carbon dioxide during the last two deglaciations |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04426496 https://hal.science/hal-04426496/document https://hal.science/hal-04426496/file/s43247-024-01216-x.pdf https://doi.org/10.1038/s43247-024-01216-x |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
ISSN: 2662-4435 Communications Earth & Environment https://hal.science/hal-04426496 Communications Earth & Environment, 2024, 5 (1), pp.58. ⟨10.1038/s43247-024-01216-x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s43247-024-01216-x hal-04426496 https://hal.science/hal-04426496 https://hal.science/hal-04426496/document https://hal.science/hal-04426496/file/s43247-024-01216-x.pdf doi:10.1038/s43247-024-01216-x |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s43247-024-01216-x |
container_title |
Communications Earth & Environment |
container_volume |
5 |
container_issue |
1 |
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1797572354452226048 |