Quantifying the effect of the Drake Passage opening on the Eocene Ocean
International audience The opening of the Drake Passage (DP) during the Cenozoic is a tectonic event of paramount importance for the development of modern ocean characteristics. Notably, it has been suggested that it exerts a primary role in the onset of the Antarctic Circumpolar Current formation (...
Published in: | Paleoceanography and Paleoclimatology |
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Language: | English |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-02870316 https://hal-insu.archives-ouvertes.fr/insu-02870316/document https://hal-insu.archives-ouvertes.fr/insu-02870316/file/2020PA003889.pdf https://doi.org/10.1029/2020PA003889 |
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ftccsdartic:oai:HAL:insu-02870316v1 2023-05-15T14:02:40+02:00 Quantifying the effect of the Drake Passage opening on the Eocene Ocean Toumoulin, A. Donnadieu, Y. Ladant, J.‐B. Batenburg, Sietske Poblete, F. Dupont-Nivet, Guillaume Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) University of Michigan Ann Arbor University of Michigan System Géosciences Rennes (GR) Université de Rennes 1 (UR1) Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Centre National de la Recherche Scientifique (CNRS) Universidad de Santiago de Chile Santiago (USACH) 2020 https://hal-insu.archives-ouvertes.fr/insu-02870316 https://hal-insu.archives-ouvertes.fr/insu-02870316/document https://hal-insu.archives-ouvertes.fr/insu-02870316/file/2020PA003889.pdf https://doi.org/10.1029/2020PA003889 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2020PA003889 insu-02870316 https://hal-insu.archives-ouvertes.fr/insu-02870316 https://hal-insu.archives-ouvertes.fr/insu-02870316/document https://hal-insu.archives-ouvertes.fr/insu-02870316/file/2020PA003889.pdf doi:10.1029/2020PA003889 info:eu-repo/semantics/OpenAccess ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal-insu.archives-ouvertes.fr/insu-02870316 Paleoceanography and Paleoclimatology, American Geophysical Union, 2020, 35 (8), pp.e2020PA003889. ⟨10.1029/2020PA003889⟩ Antarctic‐Circumpolar Current Southern Ocean Neodymium climate modeling gateways Eocene [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1029/2020PA003889 2021-06-19T22:32:28Z International audience The opening of the Drake Passage (DP) during the Cenozoic is a tectonic event of paramount importance for the development of modern ocean characteristics. Notably, it has been suggested that it exerts a primary role in the onset of the Antarctic Circumpolar Current formation (ACC), in the cooling of high‐latitude South Atlantic waters and in the initiation of North Atlantic Deep Water (NADW) formation.Several model studies have aimed to assess the impacts of DP opening on climate, but most of them focused on surface climate and only few used realistic Eocene boundary conditions. Here, we revisit the impact of the DP opening on ocean circulation with the IPSL‐CM5A2 Earth System Model. Using appropriate middle Eocene (40 Ma) boundary conditions, we perform and analyze simulations with different depths of the DP (0 m, 100 m, 1000 m and 2500 m) and compare results to existing geochemical data. Our experiments show that DP opening has a strong effect on Eocene ocean structure and dynamics even for shallow depths. The DP opening notably allows the formation of a proto‐ACC and induces deep ocean cooling of 1.5°C to 2.5°C in most of the Southern Hemisphere. There is no NADW formation in our simulations regardless of the depth of the DP, suggesting that the DP on its own is not a primary control of deep‐water formation in the North Atlantic. This study elucidates how and to what extent the opening of the Drake Passage contributed to the establishment of the modern global thermohaline circulation. Article in Journal/Newspaper Antarc* Antarctic Drake Passage NADW North Atlantic Deep Water North Atlantic Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Southern Ocean The Antarctic Drake Passage Paleoceanography and Paleoclimatology 35 8 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Antarctic‐Circumpolar Current Southern Ocean Neodymium climate modeling gateways Eocene [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Antarctic‐Circumpolar Current Southern Ocean Neodymium climate modeling gateways Eocene [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Toumoulin, A. Donnadieu, Y. Ladant, J.‐B. Batenburg, Sietske Poblete, F. Dupont-Nivet, Guillaume Quantifying the effect of the Drake Passage opening on the Eocene Ocean |
topic_facet |
Antarctic‐Circumpolar Current Southern Ocean Neodymium climate modeling gateways Eocene [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The opening of the Drake Passage (DP) during the Cenozoic is a tectonic event of paramount importance for the development of modern ocean characteristics. Notably, it has been suggested that it exerts a primary role in the onset of the Antarctic Circumpolar Current formation (ACC), in the cooling of high‐latitude South Atlantic waters and in the initiation of North Atlantic Deep Water (NADW) formation.Several model studies have aimed to assess the impacts of DP opening on climate, but most of them focused on surface climate and only few used realistic Eocene boundary conditions. Here, we revisit the impact of the DP opening on ocean circulation with the IPSL‐CM5A2 Earth System Model. Using appropriate middle Eocene (40 Ma) boundary conditions, we perform and analyze simulations with different depths of the DP (0 m, 100 m, 1000 m and 2500 m) and compare results to existing geochemical data. Our experiments show that DP opening has a strong effect on Eocene ocean structure and dynamics even for shallow depths. The DP opening notably allows the formation of a proto‐ACC and induces deep ocean cooling of 1.5°C to 2.5°C in most of the Southern Hemisphere. There is no NADW formation in our simulations regardless of the depth of the DP, suggesting that the DP on its own is not a primary control of deep‐water formation in the North Atlantic. This study elucidates how and to what extent the opening of the Drake Passage contributed to the establishment of the modern global thermohaline circulation. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) University of Michigan Ann Arbor University of Michigan System Géosciences Rennes (GR) Université de Rennes 1 (UR1) Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Centre National de la Recherche Scientifique (CNRS) Universidad de Santiago de Chile Santiago (USACH) |
format |
Article in Journal/Newspaper |
author |
Toumoulin, A. Donnadieu, Y. Ladant, J.‐B. Batenburg, Sietske Poblete, F. Dupont-Nivet, Guillaume |
author_facet |
Toumoulin, A. Donnadieu, Y. Ladant, J.‐B. Batenburg, Sietske Poblete, F. Dupont-Nivet, Guillaume |
author_sort |
Toumoulin, A. |
title |
Quantifying the effect of the Drake Passage opening on the Eocene Ocean |
title_short |
Quantifying the effect of the Drake Passage opening on the Eocene Ocean |
title_full |
Quantifying the effect of the Drake Passage opening on the Eocene Ocean |
title_fullStr |
Quantifying the effect of the Drake Passage opening on the Eocene Ocean |
title_full_unstemmed |
Quantifying the effect of the Drake Passage opening on the Eocene Ocean |
title_sort |
quantifying the effect of the drake passage opening on the eocene ocean |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal-insu.archives-ouvertes.fr/insu-02870316 https://hal-insu.archives-ouvertes.fr/insu-02870316/document https://hal-insu.archives-ouvertes.fr/insu-02870316/file/2020PA003889.pdf https://doi.org/10.1029/2020PA003889 |
geographic |
Antarctic Southern Ocean The Antarctic Drake Passage |
geographic_facet |
Antarctic Southern Ocean The Antarctic Drake Passage |
genre |
Antarc* Antarctic Drake Passage NADW North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage NADW North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal-insu.archives-ouvertes.fr/insu-02870316 Paleoceanography and Paleoclimatology, American Geophysical Union, 2020, 35 (8), pp.e2020PA003889. ⟨10.1029/2020PA003889⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020PA003889 insu-02870316 https://hal-insu.archives-ouvertes.fr/insu-02870316 https://hal-insu.archives-ouvertes.fr/insu-02870316/document https://hal-insu.archives-ouvertes.fr/insu-02870316/file/2020PA003889.pdf doi:10.1029/2020PA003889 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2020PA003889 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
35 |
container_issue |
8 |
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1766273021247488000 |