The role of East-Tethys seaway closure in the middle Miocene climatic transition (ca. 14 Ma)

International audience The Middle Miocene Climatic Transition (MMCT, approximately 14 Ma) is a key period in Cenozoic cooling and cryospheric expansion. Despite being well documented in isotopic record, the causes of the MMCT are still a matter of debate. Among various hypotheses, some authors sugge...

Full description

Bibliographic Details
Published in:Climate of the Past
Main Authors: Hamon, Noémie, Sépulchre, P., Lefebvre, V., Ramstein, G.
Other Authors: Institut International de Paléoprimatologie, Paléontologie Humaine : Evolution et Paléoenvironnement (IPHEP), Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers, 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), Modélisation du climat (CLIM), 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)-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 Environnement Toulouse (GET), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2013
Subjects:
Online Access:https://hal.archives-ouvertes.fr/hal-01263180
https://hal.archives-ouvertes.fr/hal-01263180/document
https://hal.archives-ouvertes.fr/hal-01263180/file/cp-9-2687-2013.pdf
https://doi.org/10.5194/cp-9-2687-2013
id ftccsdartic:oai:HAL:hal-01263180v1
record_format openpolar
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.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
spellingShingle [SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
Hamon, Noémie
Sépulchre, P.
Lefebvre, V.
Ramstein, G.
The role of East-Tethys seaway closure in the middle Miocene climatic transition (ca. 14 Ma)
topic_facet [SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
description International audience The Middle Miocene Climatic Transition (MMCT, approximately 14 Ma) is a key period in Cenozoic cooling and cryospheric expansion. Despite being well documented in isotopic record, the causes of the MMCT are still a matter of debate. Among various hypotheses, some authors suggested that it was due the final closure of the eastern Tethys seaway and subsequent oceanic circulation reorganisation. The aim of the present study is to quantify the impact of varying Tethys seaway depths on middle Miocene ocean and climate, in order to better understand its role in the MMCT. We present four sensitivity experiments with a fully coupled ocean-atmosphere general circulation model. Our results indicate the presence of a warm and salty water source in the northern Indian Ocean when the eastern Tethys is deep open (4000 or 1000 m), which corresponds to the Tethyan Indian Saline Water (TISW) described on the basis of isotopic studies. This water source is absent in the experiments with shallow (250 m) and closed Tethys seaway, inducing strong changes in the latitudinal density gradient and ultimately the reinforcement of the Antarctic Circumpolar Current (ACC). Moreover, when the Tethys seaway is shallow or closed, there is a westward water flow in the Gibraltar Strait that strengthens the Atlantic Meridional Overturning Circulation (AMOC) compared to the experiments with deep-open Tethys seaway. Our results therefore suggest that the shoal-ing and final closure of the eastern Tethys seaway played a major role in the oceanic circulation reorganisation during the middle Miocene. The results presented here provide new constraints on the timing of the Tethys seaway closure and particularly indicate that, prior to 14 Ma, a deep-open Tethys seaway should have allowed the formation of TISW. Moreover, whereas the final closure of this seaway likely played a major role in the reor-ganisation of oceanic circulation, we suggest that it was not the main driver of the global cooling and Antarctica ice-sheet ...
author2 Institut International de Paléoprimatologie, Paléontologie Humaine : Evolution et Paléoenvironnement (IPHEP)
Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers
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)
Modélisation du climat (CLIM)
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)-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 Environnement Toulouse (GET)
Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3)
Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP)
Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)
format Article in Journal/Newspaper
author Hamon, Noémie
Sépulchre, P.
Lefebvre, V.
Ramstein, G.
author_facet Hamon, Noémie
Sépulchre, P.
Lefebvre, V.
Ramstein, G.
author_sort Hamon, Noémie
title The role of East-Tethys seaway closure in the middle Miocene climatic transition (ca. 14 Ma)
title_short The role of East-Tethys seaway closure in the middle Miocene climatic transition (ca. 14 Ma)
title_full The role of East-Tethys seaway closure in the middle Miocene climatic transition (ca. 14 Ma)
title_fullStr The role of East-Tethys seaway closure in the middle Miocene climatic transition (ca. 14 Ma)
title_full_unstemmed The role of East-Tethys seaway closure in the middle Miocene climatic transition (ca. 14 Ma)
title_sort role of east-tethys seaway closure in the middle miocene climatic transition (ca. 14 ma)
publisher HAL CCSD
publishDate 2013
url https://hal.archives-ouvertes.fr/hal-01263180
https://hal.archives-ouvertes.fr/hal-01263180/document
https://hal.archives-ouvertes.fr/hal-01263180/file/cp-9-2687-2013.pdf
https://doi.org/10.5194/cp-9-2687-2013
geographic Antarctic
The Antarctic
Indian
geographic_facet Antarctic
The Antarctic
Indian
genre Antarc*
Antarctic
Antarctica
Ice Sheet
genre_facet Antarc*
Antarctic
Antarctica
Ice Sheet
op_source ISSN: 1814-9324
EISSN: 1814-9332
Climate of the Past
https://hal.archives-ouvertes.fr/hal-01263180
Climate of the Past, European Geosciences Union (EGU), 2013, 9, pp.2687-2702. ⟨10.5194/cp-9-2687-2013⟩
op_relation info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-2687-2013
hal-01263180
https://hal.archives-ouvertes.fr/hal-01263180
https://hal.archives-ouvertes.fr/hal-01263180/document
https://hal.archives-ouvertes.fr/hal-01263180/file/cp-9-2687-2013.pdf
doi:10.5194/cp-9-2687-2013
op_rights info:eu-repo/semantics/OpenAccess
op_doi https://doi.org/10.5194/cp-9-2687-2013
container_title Climate of the Past
container_volume 9
container_issue 6
container_start_page 2687
op_container_end_page 2702
_version_ 1766246821732024320
spelling ftccsdartic:oai:HAL:hal-01263180v1 2023-05-15T13:47:15+02:00 The role of East-Tethys seaway closure in the middle Miocene climatic transition (ca. 14 Ma) Hamon, Noémie Sépulchre, P. Lefebvre, V. Ramstein, G. Institut International de Paléoprimatologie, Paléontologie Humaine : Evolution et Paléoenvironnement (IPHEP) Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers 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) Modélisation du climat (CLIM) 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)-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 Environnement Toulouse (GET) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD) 2013 https://hal.archives-ouvertes.fr/hal-01263180 https://hal.archives-ouvertes.fr/hal-01263180/document https://hal.archives-ouvertes.fr/hal-01263180/file/cp-9-2687-2013.pdf https://doi.org/10.5194/cp-9-2687-2013 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-2687-2013 hal-01263180 https://hal.archives-ouvertes.fr/hal-01263180 https://hal.archives-ouvertes.fr/hal-01263180/document https://hal.archives-ouvertes.fr/hal-01263180/file/cp-9-2687-2013.pdf doi:10.5194/cp-9-2687-2013 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-01263180 Climate of the Past, European Geosciences Union (EGU), 2013, 9, pp.2687-2702. ⟨10.5194/cp-9-2687-2013⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2013 ftccsdartic https://doi.org/10.5194/cp-9-2687-2013 2021-12-25T23:38:45Z International audience The Middle Miocene Climatic Transition (MMCT, approximately 14 Ma) is a key period in Cenozoic cooling and cryospheric expansion. Despite being well documented in isotopic record, the causes of the MMCT are still a matter of debate. Among various hypotheses, some authors suggested that it was due the final closure of the eastern Tethys seaway and subsequent oceanic circulation reorganisation. The aim of the present study is to quantify the impact of varying Tethys seaway depths on middle Miocene ocean and climate, in order to better understand its role in the MMCT. We present four sensitivity experiments with a fully coupled ocean-atmosphere general circulation model. Our results indicate the presence of a warm and salty water source in the northern Indian Ocean when the eastern Tethys is deep open (4000 or 1000 m), which corresponds to the Tethyan Indian Saline Water (TISW) described on the basis of isotopic studies. This water source is absent in the experiments with shallow (250 m) and closed Tethys seaway, inducing strong changes in the latitudinal density gradient and ultimately the reinforcement of the Antarctic Circumpolar Current (ACC). Moreover, when the Tethys seaway is shallow or closed, there is a westward water flow in the Gibraltar Strait that strengthens the Atlantic Meridional Overturning Circulation (AMOC) compared to the experiments with deep-open Tethys seaway. Our results therefore suggest that the shoal-ing and final closure of the eastern Tethys seaway played a major role in the oceanic circulation reorganisation during the middle Miocene. The results presented here provide new constraints on the timing of the Tethys seaway closure and particularly indicate that, prior to 14 Ma, a deep-open Tethys seaway should have allowed the formation of TISW. Moreover, whereas the final closure of this seaway likely played a major role in the reor-ganisation of oceanic circulation, we suggest that it was not the main driver of the global cooling and Antarctica ice-sheet ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Indian Climate of the Past 9 6 2687 2702