An Earth System modeling study of the recent geological history of the global oceanic circulation over the Cenozoic
International audience The impact of the Drake Passage (DP) opening on climate is being debated for dozens of years. Indeed, being one of the major geographical changes occurring during the Eocene and at the beginning of a global climate cooling, it has often generated a lot of interest. To date, ev...
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ftccsdartic:oai:HAL:insu-02413459v1 2023-05-15T13:48:56+02:00 An Earth System modeling study of the recent geological history of the global oceanic circulation over the Cenozoic Donnadieu, Yannick Ladant, Jean-Baptiste Dupont-Nivet, Guillaume Toumoulin, Agathe Poblete, Fernando Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Géosciences Rennes (GR) Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 1 (UR1) Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES) Universidad de Chile = University of Chile Santiago (UCHILE) American Geophysical Union San Francisco, United States 2019-12-09 https://hal-insu.archives-ouvertes.fr/insu-02413459 en eng HAL CCSD insu-02413459 https://hal-insu.archives-ouvertes.fr/insu-02413459 American Geophysical Union Fall Meeting 2019 https://hal-insu.archives-ouvertes.fr/insu-02413459 American Geophysical Union Fall Meeting 2019, Dec 2019, San Francisco, United States. pp.GP53A-0657, 2019 https://www.agu.org/fall-meeting [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/conferenceObject Poster communications 2019 ftccsdartic 2021-12-19T01:35:17Z International audience The impact of the Drake Passage (DP) opening on climate is being debated for dozens of years. Indeed, being one of the major geographical changes occurring during the Eocene and at the beginning of a global climate cooling, it has often generated a lot of interest. To date, even though the overall signal remains unclear, it is considered as one of the main potential cause of the contemporaneous climate change. Several model studies have been aiming to assess the importance of this gateway opening through different more or less complex models. However, according to our knowledge on palaeoenvironments, most of them considered unrealistic boundary conditions (notably a low pCO2 or a today-like geography) that might corrupt the transposition of their results to the original deep-time context. In order to better understand if and how climate might have been affected by this gateway opening, the DP question is here evaluated using an up2date IPCC like model, the IPSL-CM5A2. Several simulations have been done using boundary conditions encountered over the Cenozoic from the Early Eocene to the Middle Miocene. For each time period, the role of the atmospheric CO2 level and of the depth and geometry of major marine gateways have been tested. We aim here to better understanding the history of the deep oceanic circulation and its link to the strength of the Antarctic Circumpolar Current. A particular focus will be done on the Eocene-Oligocene transition and on the Early Miocene, a time period during which it has been suggested a narrowing of the Drake Passage. Finally, the impact of the East Tethysian gateway will also be studied both on the global oceanic circulation and on its impact on atmospheric dynamics, specifically over the continents surrounding the Mediterranean region. Conference Object Antarc* Antarctic Drake Passage Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Drake Passage |
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 |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Donnadieu, Yannick Ladant, Jean-Baptiste Dupont-Nivet, Guillaume Toumoulin, Agathe Poblete, Fernando An Earth System modeling study of the recent geological history of the global oceanic circulation over the Cenozoic |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The impact of the Drake Passage (DP) opening on climate is being debated for dozens of years. Indeed, being one of the major geographical changes occurring during the Eocene and at the beginning of a global climate cooling, it has often generated a lot of interest. To date, even though the overall signal remains unclear, it is considered as one of the main potential cause of the contemporaneous climate change. Several model studies have been aiming to assess the importance of this gateway opening through different more or less complex models. However, according to our knowledge on palaeoenvironments, most of them considered unrealistic boundary conditions (notably a low pCO2 or a today-like geography) that might corrupt the transposition of their results to the original deep-time context. In order to better understand if and how climate might have been affected by this gateway opening, the DP question is here evaluated using an up2date IPCC like model, the IPSL-CM5A2. Several simulations have been done using boundary conditions encountered over the Cenozoic from the Early Eocene to the Middle Miocene. For each time period, the role of the atmospheric CO2 level and of the depth and geometry of major marine gateways have been tested. We aim here to better understanding the history of the deep oceanic circulation and its link to the strength of the Antarctic Circumpolar Current. A particular focus will be done on the Eocene-Oligocene transition and on the Early Miocene, a time period during which it has been suggested a narrowing of the Drake Passage. Finally, the impact of the East Tethysian gateway will also be studied both on the global oceanic circulation and on its impact on atmospheric dynamics, specifically over the continents surrounding the Mediterranean region. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Géosciences Rennes (GR) Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 1 (UR1) Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES) Universidad de Chile = University of Chile Santiago (UCHILE) American Geophysical Union |
format |
Conference Object |
author |
Donnadieu, Yannick Ladant, Jean-Baptiste Dupont-Nivet, Guillaume Toumoulin, Agathe Poblete, Fernando |
author_facet |
Donnadieu, Yannick Ladant, Jean-Baptiste Dupont-Nivet, Guillaume Toumoulin, Agathe Poblete, Fernando |
author_sort |
Donnadieu, Yannick |
title |
An Earth System modeling study of the recent geological history of the global oceanic circulation over the Cenozoic |
title_short |
An Earth System modeling study of the recent geological history of the global oceanic circulation over the Cenozoic |
title_full |
An Earth System modeling study of the recent geological history of the global oceanic circulation over the Cenozoic |
title_fullStr |
An Earth System modeling study of the recent geological history of the global oceanic circulation over the Cenozoic |
title_full_unstemmed |
An Earth System modeling study of the recent geological history of the global oceanic circulation over the Cenozoic |
title_sort |
earth system modeling study of the recent geological history of the global oceanic circulation over the cenozoic |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal-insu.archives-ouvertes.fr/insu-02413459 |
op_coverage |
San Francisco, United States |
geographic |
Antarctic The Antarctic Drake Passage |
geographic_facet |
Antarctic The Antarctic Drake Passage |
genre |
Antarc* Antarctic Drake Passage |
genre_facet |
Antarc* Antarctic Drake Passage |
op_source |
American Geophysical Union Fall Meeting 2019 https://hal-insu.archives-ouvertes.fr/insu-02413459 American Geophysical Union Fall Meeting 2019, Dec 2019, San Francisco, United States. pp.GP53A-0657, 2019 https://www.agu.org/fall-meeting |
op_relation |
insu-02413459 https://hal-insu.archives-ouvertes.fr/insu-02413459 |
_version_ |
1766249986408841216 |