Impact of an acceleration of ice sheet melting on monsoon systems
International audience The study of past climates has demonstrated the occurrence of Heinrich events during which major ice discharges occurred at the polar ice sheet, leading to significant additional sea level rise. Heinrich events strongly influenced the oceanic circulation and global climate. Ho...
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ftceafr:oai:HAL:hal-03771821v1 2024-09-15T17:42:21+00:00 Impact of an acceleration of ice sheet melting on monsoon systems Chemison, Alizée Defrance, Dimitri Ramstein, Gilles Caminade, Cyril 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)) Abdus Salam International Centre for Theoretical Physics Trieste (ICTP) 2022-08-30 https://hal.science/hal-03771821 https://hal.science/hal-03771821/document https://hal.science/hal-03771821/file/esd-13-1259-2022.pdf https://doi.org/10.5194/esd-13-1259-2022 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/esd-13-1259-2022 hal-03771821 https://hal.science/hal-03771821 https://hal.science/hal-03771821/document https://hal.science/hal-03771821/file/esd-13-1259-2022.pdf doi:10.5194/esd-13-1259-2022 info:eu-repo/semantics/OpenAccess ISSN: 2190-4979 EISSN: 2190-4987 Earth System Dynamics https://hal.science/hal-03771821 Earth System Dynamics, 2022, 13 (3), pp.1259 - 1287. ⟨10.5194/esd-13-1259-2022⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2022 ftceafr https://doi.org/10.5194/esd-13-1259-2022 2024-07-22T13:10:06Z International audience The study of past climates has demonstrated the occurrence of Heinrich events during which major ice discharges occurred at the polar ice sheet, leading to significant additional sea level rise. Heinrich events strongly influenced the oceanic circulation and global climate. However, standard climate change scenarios (Representative Concentration Pathways or RCPs) do not consider such potential rapid ice sheet collapse; RCPs only consider the dynamic evolution of greenhouse gas emissions. We carried out water-hosing simulations using the Institute Pierre Simon Laplace global Climate Model (IPSL-CM5A) to simulate a rapid melting of the Greenland and Antarctic ice sheets, equivalent to +1 and +3 m additional sea level rise (SLR). Freshwater inputs were added to the standard RCP8.5 emission scenario over the 21st century. The contribution to the SLR from Greenland or from Antarctic ice sheets has differentiated impacts. The freshwater input in the Antarctic is diluted by the circumpolar current, and its global impact is moderate. Conversely, a rapid melting of the ice sheet in the North Atlantic slows down the Atlantic Meridional Overturning Circulation. This slowdown leads to changes in winds, inter-hemispheric temperature and pressure gradients, resulting in a southward shift of the tropical rain belt over the Atlantic and eastern Pacific region. The American and African monsoons are strongly affected and shift to the south. Changes in the North American monsoon occur later, while changes in the South American monsoon start earlier. The North African monsoon is drier during boreal summer, while the southern African monsoon intensifies during austral summer. Simulated changes were not significant for the Asian and Australian monsoons. Article in Journal/Newspaper Antarc* Antarctic Greenland Ice Sheet North Atlantic HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Earth System Dynamics 13 3 1259 1287 |
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Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
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ftceafr |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Chemison, Alizée Defrance, Dimitri Ramstein, Gilles Caminade, Cyril Impact of an acceleration of ice sheet melting on monsoon systems |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The study of past climates has demonstrated the occurrence of Heinrich events during which major ice discharges occurred at the polar ice sheet, leading to significant additional sea level rise. Heinrich events strongly influenced the oceanic circulation and global climate. However, standard climate change scenarios (Representative Concentration Pathways or RCPs) do not consider such potential rapid ice sheet collapse; RCPs only consider the dynamic evolution of greenhouse gas emissions. We carried out water-hosing simulations using the Institute Pierre Simon Laplace global Climate Model (IPSL-CM5A) to simulate a rapid melting of the Greenland and Antarctic ice sheets, equivalent to +1 and +3 m additional sea level rise (SLR). Freshwater inputs were added to the standard RCP8.5 emission scenario over the 21st century. The contribution to the SLR from Greenland or from Antarctic ice sheets has differentiated impacts. The freshwater input in the Antarctic is diluted by the circumpolar current, and its global impact is moderate. Conversely, a rapid melting of the ice sheet in the North Atlantic slows down the Atlantic Meridional Overturning Circulation. This slowdown leads to changes in winds, inter-hemispheric temperature and pressure gradients, resulting in a southward shift of the tropical rain belt over the Atlantic and eastern Pacific region. The American and African monsoons are strongly affected and shift to the south. Changes in the North American monsoon occur later, while changes in the South American monsoon start earlier. The North African monsoon is drier during boreal summer, while the southern African monsoon intensifies during austral summer. Simulated changes were not significant for the Asian and Australian monsoons. |
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)) Abdus Salam International Centre for Theoretical Physics Trieste (ICTP) |
format |
Article in Journal/Newspaper |
author |
Chemison, Alizée Defrance, Dimitri Ramstein, Gilles Caminade, Cyril |
author_facet |
Chemison, Alizée Defrance, Dimitri Ramstein, Gilles Caminade, Cyril |
author_sort |
Chemison, Alizée |
title |
Impact of an acceleration of ice sheet melting on monsoon systems |
title_short |
Impact of an acceleration of ice sheet melting on monsoon systems |
title_full |
Impact of an acceleration of ice sheet melting on monsoon systems |
title_fullStr |
Impact of an acceleration of ice sheet melting on monsoon systems |
title_full_unstemmed |
Impact of an acceleration of ice sheet melting on monsoon systems |
title_sort |
impact of an acceleration of ice sheet melting on monsoon systems |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03771821 https://hal.science/hal-03771821/document https://hal.science/hal-03771821/file/esd-13-1259-2022.pdf https://doi.org/10.5194/esd-13-1259-2022 |
genre |
Antarc* Antarctic Greenland Ice Sheet North Atlantic |
genre_facet |
Antarc* Antarctic Greenland Ice Sheet North Atlantic |
op_source |
ISSN: 2190-4979 EISSN: 2190-4987 Earth System Dynamics https://hal.science/hal-03771821 Earth System Dynamics, 2022, 13 (3), pp.1259 - 1287. ⟨10.5194/esd-13-1259-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/esd-13-1259-2022 hal-03771821 https://hal.science/hal-03771821 https://hal.science/hal-03771821/document https://hal.science/hal-03771821/file/esd-13-1259-2022.pdf doi:10.5194/esd-13-1259-2022 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/esd-13-1259-2022 |
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Earth System Dynamics |
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