Deglacial climate changes as forced by different ice sheet reconstructions
During the last deglaciation, the climate evolves from a cold state at the Last Glacial Maximum (LGM) at 21 ka (thousand years ago) with large ice sheets to the warm Holocene at 1/49 ka with reduced ice sheets. The deglacial ice sheet melt can impact the climate through multiple ways: changes of top...
Published in: | Climate of the Past |
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2023
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Online Access: | https://research.vu.nl/en/publications/6bc0b3ae-a7dc-41ee-ac6c-ec9317589d71 https://doi.org/10.5194/cp-19-1027-2023 https://hdl.handle.net/1871.1/6bc0b3ae-a7dc-41ee-ac6c-ec9317589d71 http://www.scopus.com/inward/record.url?scp=85163818998&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85163818998&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/6bc0b3ae-a7dc-41ee-ac6c-ec9317589d71 2024-09-09T19:10:18+00:00 Deglacial climate changes as forced by different ice sheet reconstructions Bouttes, Nathaelle Lhardy, Fanny Quiquet, Aurélien Aillard, Didier Goosse, Hugues Roche, Didier M. 2023 https://research.vu.nl/en/publications/6bc0b3ae-a7dc-41ee-ac6c-ec9317589d71 https://doi.org/10.5194/cp-19-1027-2023 https://hdl.handle.net/1871.1/6bc0b3ae-a7dc-41ee-ac6c-ec9317589d71 http://www.scopus.com/inward/record.url?scp=85163818998&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85163818998&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/6bc0b3ae-a7dc-41ee-ac6c-ec9317589d71 info:eu-repo/semantics/openAccess Bouttes , N , Lhardy , F , Quiquet , A , Aillard , D , Goosse , H & Roche , D M 2023 , ' Deglacial climate changes as forced by different ice sheet reconstructions ' , Climate of the Past , vol. 19 , no. 5 , pp. 1027-1042 . https://doi.org/10.5194/cp-19-1027-2023 article 2023 ftvuamstcris https://doi.org/10.5194/cp-19-1027-2023 2024-08-29T00:18:49Z During the last deglaciation, the climate evolves from a cold state at the Last Glacial Maximum (LGM) at 21 ka (thousand years ago) with large ice sheets to the warm Holocene at 1/49 ka with reduced ice sheets. The deglacial ice sheet melt can impact the climate through multiple ways: changes of topography and albedo, bathymetry and coastlines, and freshwater fluxes (FWFs). In the PMIP4 (Paleoclimate Modelling Intercomparison Project - Phase 4) protocol for deglacial simulations, these changes can be accounted for or not depending on the modelling group choices. In addition, two ice sheet reconstructions are available (ICE-6G_C and GLAC-1D). In this study, we evaluate all these effects related to ice sheet changes on the climate using the iLOVECLIM model of intermediate complexity. We show that the two reconstructions yield the same warming to a first order but with a different amplitude (global mean temperature of 3.9 C with ICE-6G_C and 3.8 C with GLAC-1D) and evolution. We obtain a stalling of temperature rise during the Antarctic Cold Reversal (ACR, from 1/414 to 1/412 ka) similar to proxy data only with the GLAC-1D ice sheet reconstruction. Accounting for changes in bathymetry in the simulations results in a cooling due to a larger sea ice extent and higher surface albedo. Finally, freshwater fluxes result in Atlantic meridional overturning circulation (AMOC) drawdown, but the timing in the simulations disagrees with proxy data of ocean circulation changes. This questions the causal link between reconstructed freshwater fluxes from ice sheet melt and recorded AMOC weakening. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Sea ice Vrije Universiteit Amsterdam (VU): Research Portal Antarctic The Antarctic Climate of the Past 19 5 1027 1042 |
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Open Polar |
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Vrije Universiteit Amsterdam (VU): Research Portal |
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ftvuamstcris |
language |
English |
description |
During the last deglaciation, the climate evolves from a cold state at the Last Glacial Maximum (LGM) at 21 ka (thousand years ago) with large ice sheets to the warm Holocene at 1/49 ka with reduced ice sheets. The deglacial ice sheet melt can impact the climate through multiple ways: changes of topography and albedo, bathymetry and coastlines, and freshwater fluxes (FWFs). In the PMIP4 (Paleoclimate Modelling Intercomparison Project - Phase 4) protocol for deglacial simulations, these changes can be accounted for or not depending on the modelling group choices. In addition, two ice sheet reconstructions are available (ICE-6G_C and GLAC-1D). In this study, we evaluate all these effects related to ice sheet changes on the climate using the iLOVECLIM model of intermediate complexity. We show that the two reconstructions yield the same warming to a first order but with a different amplitude (global mean temperature of 3.9 C with ICE-6G_C and 3.8 C with GLAC-1D) and evolution. We obtain a stalling of temperature rise during the Antarctic Cold Reversal (ACR, from 1/414 to 1/412 ka) similar to proxy data only with the GLAC-1D ice sheet reconstruction. Accounting for changes in bathymetry in the simulations results in a cooling due to a larger sea ice extent and higher surface albedo. Finally, freshwater fluxes result in Atlantic meridional overturning circulation (AMOC) drawdown, but the timing in the simulations disagrees with proxy data of ocean circulation changes. This questions the causal link between reconstructed freshwater fluxes from ice sheet melt and recorded AMOC weakening. |
format |
Article in Journal/Newspaper |
author |
Bouttes, Nathaelle Lhardy, Fanny Quiquet, Aurélien Aillard, Didier Goosse, Hugues Roche, Didier M. |
spellingShingle |
Bouttes, Nathaelle Lhardy, Fanny Quiquet, Aurélien Aillard, Didier Goosse, Hugues Roche, Didier M. Deglacial climate changes as forced by different ice sheet reconstructions |
author_facet |
Bouttes, Nathaelle Lhardy, Fanny Quiquet, Aurélien Aillard, Didier Goosse, Hugues Roche, Didier M. |
author_sort |
Bouttes, Nathaelle |
title |
Deglacial climate changes as forced by different ice sheet reconstructions |
title_short |
Deglacial climate changes as forced by different ice sheet reconstructions |
title_full |
Deglacial climate changes as forced by different ice sheet reconstructions |
title_fullStr |
Deglacial climate changes as forced by different ice sheet reconstructions |
title_full_unstemmed |
Deglacial climate changes as forced by different ice sheet reconstructions |
title_sort |
deglacial climate changes as forced by different ice sheet reconstructions |
publishDate |
2023 |
url |
https://research.vu.nl/en/publications/6bc0b3ae-a7dc-41ee-ac6c-ec9317589d71 https://doi.org/10.5194/cp-19-1027-2023 https://hdl.handle.net/1871.1/6bc0b3ae-a7dc-41ee-ac6c-ec9317589d71 http://www.scopus.com/inward/record.url?scp=85163818998&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85163818998&partnerID=8YFLogxK |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Sea ice |
genre_facet |
Antarc* Antarctic Ice Sheet Sea ice |
op_source |
Bouttes , N , Lhardy , F , Quiquet , A , Aillard , D , Goosse , H & Roche , D M 2023 , ' Deglacial climate changes as forced by different ice sheet reconstructions ' , Climate of the Past , vol. 19 , no. 5 , pp. 1027-1042 . https://doi.org/10.5194/cp-19-1027-2023 |
op_relation |
https://research.vu.nl/en/publications/6bc0b3ae-a7dc-41ee-ac6c-ec9317589d71 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-19-1027-2023 |
container_title |
Climate of the Past |
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19 |
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5 |
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1027 |
op_container_end_page |
1042 |
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1809825100070912000 |