Climatic impacts of fresh water hosing under Last Glacial Maximum conditions: a multi-model study
International audience Fresh water hosing simulations, in which a fresh water flux is imposed in the North Atlantic to force fluctuations of the Atlantic Meridional Overturning Circulation, have been routinely performed, first to study the climatic signature of different states of this circulation,...
Published in: | Climate of the Past |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Online Access: | https://hal.science/hal-02931558 https://hal.science/hal-02931558/document https://hal.science/hal-02931558/file/cp-9-935-2013.pdf https://doi.org/10.5194/cp-9-935-2013 |
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Institut national des sciences de l'Univers: HAL-INSU |
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English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
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[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Kageyama, M. Merkel, U. Otto-Bliesner, B. Prange, M. Abe-Ouchi, A. Lohmann, G. Ohgaito, R. Roche, Didier M. Singarayer, J. Swingedouw, D. Zhang, X. Climatic impacts of fresh water hosing under Last Glacial Maximum conditions: a multi-model study |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Fresh water hosing simulations, in which a fresh water flux is imposed in the North Atlantic to force fluctuations of the Atlantic Meridional Overturning Circulation, have been routinely performed, first to study the climatic signature of different states of this circulation, then, under present or future conditions, to investigate the potential impact of a partial melting of the Greenland ice sheet. The most compelling examples of climatic changes potentially related to AMOC abrupt variations, however, are found in high resolution palaeo-records from around the globe for the last glacial period. To study those more specifically, more and more fresh water hosing experiments have been performed under glacial conditions in the recent years. Here we compare an ensemble constituted by 11 such simulations run with 6 different climate models. All simulations follow a slightly different design, but are sufficiently close in their design to be compared. They all study the impact of a fresh water hosing imposed in the extra-tropical North Atlantic. Common features in the model responses to hosing are the cooling over the North Atlantic, extending along the sub-tropical gyre in the tropical North Atlantic, the southward shift of the Atlantic ITCZ and the weakening of the African and Indian monsoons. On the other hand, the expression of the bipolar see-saw, i.e., warming in the Southern Hemisphere, differs from model to model, with some restricting it to the South Atlantic and specific regions of the southern ocean while others simulate a widespread southern ocean warming. The relationships between the features common to most models, i.e., climate changes over the north and tropical Atlantic, African and Asian monsoon regions, are further quantified. These suggest a tight correlation between the temperature and precipitation changes over the extra-tropical North Atlantic, but different pathways for the teleconnections between the AMOC/North Atlantic region and the African and Indian monsoon regions. |
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)) Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen National Center for Atmospheric Research Boulder (NCAR) Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association University of Bristol Bristol The publication of this article is financed by CNRS-INSU |
format |
Article in Journal/Newspaper |
author |
Kageyama, M. Merkel, U. Otto-Bliesner, B. Prange, M. Abe-Ouchi, A. Lohmann, G. Ohgaito, R. Roche, Didier M. Singarayer, J. Swingedouw, D. Zhang, X. |
author_facet |
Kageyama, M. Merkel, U. Otto-Bliesner, B. Prange, M. Abe-Ouchi, A. Lohmann, G. Ohgaito, R. Roche, Didier M. Singarayer, J. Swingedouw, D. Zhang, X. |
author_sort |
Kageyama, M. |
title |
Climatic impacts of fresh water hosing under Last Glacial Maximum conditions: a multi-model study |
title_short |
Climatic impacts of fresh water hosing under Last Glacial Maximum conditions: a multi-model study |
title_full |
Climatic impacts of fresh water hosing under Last Glacial Maximum conditions: a multi-model study |
title_fullStr |
Climatic impacts of fresh water hosing under Last Glacial Maximum conditions: a multi-model study |
title_full_unstemmed |
Climatic impacts of fresh water hosing under Last Glacial Maximum conditions: a multi-model study |
title_sort |
climatic impacts of fresh water hosing under last glacial maximum conditions: a multi-model study |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-02931558 https://hal.science/hal-02931558/document https://hal.science/hal-02931558/file/cp-9-935-2013.pdf https://doi.org/10.5194/cp-9-935-2013 |
genre |
Greenland Ice Sheet North Atlantic Southern Ocean |
genre_facet |
Greenland Ice Sheet North Atlantic Southern Ocean |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-02931558 Climate of the Past, 2013, 9 (2), pp.935-953. ⟨10.5194/cp-9-935-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-935-2013 hal-02931558 https://hal.science/hal-02931558 https://hal.science/hal-02931558/document https://hal.science/hal-02931558/file/cp-9-935-2013.pdf doi:10.5194/cp-9-935-2013 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-9-935-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
2 |
container_start_page |
935 |
op_container_end_page |
953 |
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1797584064412123136 |
spelling |
ftinsu:oai:HAL:hal-02931558v1 2024-04-28T08:22:28+00:00 Climatic impacts of fresh water hosing under Last Glacial Maximum conditions: a multi-model study Kageyama, M. Merkel, U. Otto-Bliesner, B. Prange, M. Abe-Ouchi, A. Lohmann, G. Ohgaito, R. Roche, Didier M. Singarayer, J. Swingedouw, D. Zhang, X. 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)) Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen National Center for Atmospheric Research Boulder (NCAR) Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association University of Bristol Bristol The publication of this article is financed by CNRS-INSU 2013 https://hal.science/hal-02931558 https://hal.science/hal-02931558/document https://hal.science/hal-02931558/file/cp-9-935-2013.pdf https://doi.org/10.5194/cp-9-935-2013 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-935-2013 hal-02931558 https://hal.science/hal-02931558 https://hal.science/hal-02931558/document https://hal.science/hal-02931558/file/cp-9-935-2013.pdf doi:10.5194/cp-9-935-2013 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-02931558 Climate of the Past, 2013, 9 (2), pp.935-953. ⟨10.5194/cp-9-935-2013⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2013 ftinsu https://doi.org/10.5194/cp-9-935-2013 2024-04-05T00:41:30Z International audience Fresh water hosing simulations, in which a fresh water flux is imposed in the North Atlantic to force fluctuations of the Atlantic Meridional Overturning Circulation, have been routinely performed, first to study the climatic signature of different states of this circulation, then, under present or future conditions, to investigate the potential impact of a partial melting of the Greenland ice sheet. The most compelling examples of climatic changes potentially related to AMOC abrupt variations, however, are found in high resolution palaeo-records from around the globe for the last glacial period. To study those more specifically, more and more fresh water hosing experiments have been performed under glacial conditions in the recent years. Here we compare an ensemble constituted by 11 such simulations run with 6 different climate models. All simulations follow a slightly different design, but are sufficiently close in their design to be compared. They all study the impact of a fresh water hosing imposed in the extra-tropical North Atlantic. Common features in the model responses to hosing are the cooling over the North Atlantic, extending along the sub-tropical gyre in the tropical North Atlantic, the southward shift of the Atlantic ITCZ and the weakening of the African and Indian monsoons. On the other hand, the expression of the bipolar see-saw, i.e., warming in the Southern Hemisphere, differs from model to model, with some restricting it to the South Atlantic and specific regions of the southern ocean while others simulate a widespread southern ocean warming. The relationships between the features common to most models, i.e., climate changes over the north and tropical Atlantic, African and Asian monsoon regions, are further quantified. These suggest a tight correlation between the temperature and precipitation changes over the extra-tropical North Atlantic, but different pathways for the teleconnections between the AMOC/North Atlantic region and the African and Indian monsoon regions. Article in Journal/Newspaper Greenland Ice Sheet North Atlantic Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Climate of the Past 9 2 935 953 |