Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau
International audience The role of the Tibetan Plateau (TP) in maintaining the large-scale overturning circulation in the Atlantic and Pacific is investigated using a coupled atmosphere-ocean model. For the present day with a realistic topography, model simulation shows a strong Atlantic meridional...
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ftuniversailles:oai:HAL:hal-02321893v1 2024-04-28T08:30:15+00:00 Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau Su, Baohuang Jiang, Dabang Zhang, Ran Sepulchre, Pierre Ramstein, Gilles 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) Modélisation du climat (CLIM) 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)) 2018 https://hal.science/hal-02321893 https://hal.science/hal-02321893/document https://hal.science/hal-02321893/file/cp-14-751-2018.pdf https://doi.org/10.5194/cp-14-751-2018 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-14-751-2018 hal-02321893 https://hal.science/hal-02321893 https://hal.science/hal-02321893/document https://hal.science/hal-02321893/file/cp-14-751-2018.pdf doi:10.5194/cp-14-751-2018 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-02321893 Climate of the Past, 2018, 14 (6), pp.751-762. ⟨10.5194/cp-14-751-2018⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2018 ftuniversailles https://doi.org/10.5194/cp-14-751-2018 2024-04-04T17:36:58Z International audience The role of the Tibetan Plateau (TP) in maintaining the large-scale overturning circulation in the Atlantic and Pacific is investigated using a coupled atmosphere-ocean model. For the present day with a realistic topography, model simulation shows a strong Atlantic meridional overturning circulation (AMOC) but a near absence of the Pacific merid-ional overturning circulation (PMOC), which are in good agreement with the present observations. In contrast, the simulation without the TP depicts a collapsed AMOC and a strong PMOC that dominates deep-water formation. The switch in deep-water formation between the two basins results from changes in the large-scale atmospheric circulation and atmosphere-ocean feedback over the Atlantic and Pacific. The intensified westerly winds and increased freshwater flux over the North Atlantic cause an initial slowdown of the AMOC, while the weakened East Asian monsoon circulation and associated decreased freshwater flux over the North Pacific give rise to the initial intensification of the PMOC. The further decreased heat flux and the associated increase in sea-ice fraction promote the final AMOC collapse over the Atlantic, while the further increased heat flux leads to the final PMOC establishment over the Pacific. Although the simulations were performed in a cold world, it still importantly implicates that the uplift of the TP alone could have been a potential driver for the reorganization of PMOC-AMOC between the late Eocene and early Oligocene. Article in Journal/Newspaper North Atlantic Sea ice Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Climate of the Past 14 6 751 762 |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Su, Baohuang Jiang, Dabang Zhang, Ran Sepulchre, Pierre Ramstein, Gilles Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The role of the Tibetan Plateau (TP) in maintaining the large-scale overturning circulation in the Atlantic and Pacific is investigated using a coupled atmosphere-ocean model. For the present day with a realistic topography, model simulation shows a strong Atlantic meridional overturning circulation (AMOC) but a near absence of the Pacific merid-ional overturning circulation (PMOC), which are in good agreement with the present observations. In contrast, the simulation without the TP depicts a collapsed AMOC and a strong PMOC that dominates deep-water formation. The switch in deep-water formation between the two basins results from changes in the large-scale atmospheric circulation and atmosphere-ocean feedback over the Atlantic and Pacific. The intensified westerly winds and increased freshwater flux over the North Atlantic cause an initial slowdown of the AMOC, while the weakened East Asian monsoon circulation and associated decreased freshwater flux over the North Pacific give rise to the initial intensification of the PMOC. The further decreased heat flux and the associated increase in sea-ice fraction promote the final AMOC collapse over the Atlantic, while the further increased heat flux leads to the final PMOC establishment over the Pacific. Although the simulations were performed in a cold world, it still importantly implicates that the uplift of the TP alone could have been a potential driver for the reorganization of PMOC-AMOC between the late Eocene and early Oligocene. |
author2 |
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) Modélisation du climat (CLIM) 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)) |
format |
Article in Journal/Newspaper |
author |
Su, Baohuang Jiang, Dabang Zhang, Ran Sepulchre, Pierre Ramstein, Gilles |
author_facet |
Su, Baohuang Jiang, Dabang Zhang, Ran Sepulchre, Pierre Ramstein, Gilles |
author_sort |
Su, Baohuang |
title |
Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau |
title_short |
Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau |
title_full |
Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau |
title_fullStr |
Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau |
title_full_unstemmed |
Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau |
title_sort |
difference between the north atlantic and pacific meridional overturning circulation in response to the uplift of the tibetan plateau |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02321893 https://hal.science/hal-02321893/document https://hal.science/hal-02321893/file/cp-14-751-2018.pdf https://doi.org/10.5194/cp-14-751-2018 |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-02321893 Climate of the Past, 2018, 14 (6), pp.751-762. ⟨10.5194/cp-14-751-2018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-14-751-2018 hal-02321893 https://hal.science/hal-02321893 https://hal.science/hal-02321893/document https://hal.science/hal-02321893/file/cp-14-751-2018.pdf doi:10.5194/cp-14-751-2018 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-14-751-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
6 |
container_start_page |
751 |
op_container_end_page |
762 |
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1797588187549270016 |