Impact of an acceleration of ice sheet melting on monsoon systems
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...
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Copernicus Publications
2022
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00062456 2023-05-15T13:49:21+02:00 Impact of an acceleration of ice sheet melting on monsoon systems Chemison, Alizée Defrance, Dimitri Ramstein, Gilles Caminade, Cyril 2022-08 electronic https://doi.org/10.5194/esd-13-1259-2022 https://noa.gwlb.de/receive/cop_mods_00062456 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061722/esd-13-1259-2022.pdf https://esd.copernicus.org/articles/13/1259/2022/esd-13-1259-2022.pdf eng eng Copernicus Publications Earth System Dynamics -- http://www.earth-syst-dynam.net/ -- http://www.bibliothek.uni-regensburg.de/ezeit/?2578793 -- 2190-4987 https://doi.org/10.5194/esd-13-1259-2022 https://noa.gwlb.de/receive/cop_mods_00062456 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061722/esd-13-1259-2022.pdf https://esd.copernicus.org/articles/13/1259/2022/esd-13-1259-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/esd-13-1259-2022 2022-09-04T23:11:54Z 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 Niedersächsisches Online-Archiv NOA Antarctic Austral Greenland Laplace ENVELOPE(141.467,141.467,-66.782,-66.782) Pacific The Antarctic Earth System Dynamics 13 3 1259 1287 |
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Niedersächsisches Online-Archiv NOA |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Chemison, Alizée Defrance, Dimitri Ramstein, Gilles Caminade, Cyril Impact of an acceleration of ice sheet melting on monsoon systems |
topic_facet |
article Verlagsveröffentlichung |
description |
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. |
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 |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/esd-13-1259-2022 https://noa.gwlb.de/receive/cop_mods_00062456 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061722/esd-13-1259-2022.pdf https://esd.copernicus.org/articles/13/1259/2022/esd-13-1259-2022.pdf |
long_lat |
ENVELOPE(141.467,141.467,-66.782,-66.782) |
geographic |
Antarctic Austral Greenland Laplace Pacific The Antarctic |
geographic_facet |
Antarctic Austral Greenland Laplace Pacific The Antarctic |
genre |
Antarc* Antarctic Greenland Ice Sheet North Atlantic |
genre_facet |
Antarc* Antarctic Greenland Ice Sheet North Atlantic |
op_relation |
Earth System Dynamics -- http://www.earth-syst-dynam.net/ -- http://www.bibliothek.uni-regensburg.de/ezeit/?2578793 -- 2190-4987 https://doi.org/10.5194/esd-13-1259-2022 https://noa.gwlb.de/receive/cop_mods_00062456 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061722/esd-13-1259-2022.pdf https://esd.copernicus.org/articles/13/1259/2022/esd-13-1259-2022.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/esd-13-1259-2022 |
container_title |
Earth System Dynamics |
container_volume |
13 |
container_issue |
3 |
container_start_page |
1259 |
op_container_end_page |
1287 |
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1766251237209014272 |