Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau
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...
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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00005577 2023-05-15T17:31:03+02:00 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 2018-06 electronic https://doi.org/10.5194/cp-14-751-2018 https://noa.gwlb.de/receive/cop_mods_00005577 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005534/cp-14-751-2018.pdf https://cp.copernicus.org/articles/14/751/2018/cp-14-751-2018.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-14-751-2018 https://noa.gwlb.de/receive/cop_mods_00005577 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005534/cp-14-751-2018.pdf https://cp.copernicus.org/articles/14/751/2018/cp-14-751-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/cp-14-751-2018 2022-02-08T22:59:29Z 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 meridional 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 Niedersächsisches Online-Archiv NOA Pacific Climate of the Past 14 6 751 762 |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung 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 |
article Verlagsveröffentlichung |
description |
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 meridional 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. |
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 |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-14-751-2018 https://noa.gwlb.de/receive/cop_mods_00005577 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005534/cp-14-751-2018.pdf https://cp.copernicus.org/articles/14/751/2018/cp-14-751-2018.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-14-751-2018 https://noa.gwlb.de/receive/cop_mods_00005577 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005534/cp-14-751-2018.pdf https://cp.copernicus.org/articles/14/751/2018/cp-14-751-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
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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