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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HAL CCSD
2019
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Online Access: | https://insu.hal.science/insu-02413459 |
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Open Polar |
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Archives ouvertes de Paris-Saclay |
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ftuniparissaclay |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
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[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) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-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) 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) Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) 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://insu.hal.science/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://insu.hal.science/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://insu.hal.science/insu-02413459 |
_version_ |
1802651846025674752 |
spelling |
ftuniparissaclay:oai:HAL:insu-02413459v1 2024-06-23T07:47:42+00:00 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) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-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) 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) Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Universidad de Chile = University of Chile Santiago (UCHILE) American Geophysical Union San Francisco, United States 2019-12-09 https://insu.hal.science/insu-02413459 en eng HAL CCSD insu-02413459 https://insu.hal.science/insu-02413459 American Geophysical Union Fall Meeting 2019 https://insu.hal.science/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 Conference poster 2019 ftuniparissaclay 2024-06-13T23:46:03Z 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 Archives ouvertes de Paris-Saclay Antarctic The Antarctic Drake Passage |