Factors controlling the last interglacial climate as simulated by LOVECLIM1.3
The last interglacial (LIG), also identified to the Eemian in Europe, began at approximately 130 kyr BP and ended at about 115 kyr BP (before present). More and more proxy-based reconstructions of the LIG climate are becoming more available even though they remain sparse. The major climate forcings...
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:150199 2024-05-12T08:07:58+00:00 Factors controlling the last interglacial climate as simulated by LOVECLIM1.3 Loutre, Marie-France Fichefet, Thierry Goosse, Hugues Huybrechts, P. Goelzer, H. Capron, E. UCL - SST/ELI/ELIC - Earth & Climate 2014 http://hdl.handle.net/2078.1/150199 https://doi.org/10.5194/cp-10-1541-2014 eng eng Copernicus GmbH boreal:150199 http://hdl.handle.net/2078.1/150199 doi:10.5194/cp-10-1541-2014 urn:ISSN:1814-9324 urn:EISSN:1814-9332 info:eu-repo/semantics/openAccess Climate of the Past, Vol. 10, no.4, p. 1541-1565 (2014) CISM:CECI 1443 info:eu-repo/semantics/article 2014 ftunistlouisbrus https://doi.org/10.5194/cp-10-1541-2014 2024-04-18T17:54:21Z The last interglacial (LIG), also identified to the Eemian in Europe, began at approximately 130 kyr BP and ended at about 115 kyr BP (before present). More and more proxy-based reconstructions of the LIG climate are becoming more available even though they remain sparse. The major climate forcings during the LIG are rather well known and therefore models can be tested against paleoclimatic data sets and then used to better understand the climate of the LIG. However, models are displaying a large range of responses,being sometimes contradictory between them or with the reconstructed data. Here we would like to investigate causes of these differences. We focus on a single climate model, LOVECLIM, and we perform transient simulations over the LIG, starting at 135 kyr BP and run until 115 kyr BP. With these simulations, we test the role of the surface boundary conditions (the time-evolution of the Northern Hemisphere (NH) ice sheets) on the simulated LIG climate and the importance of the parameter sets (internal to the model, such as the albedos of the ocean and sea ice), which affect the sensitivity of the model. The magnitude of the simulated climate variations through the LIG remains too low compared to reconstructions for climate variables such as surface air temperature. Moreover, in the North Atlantic, the large increase in summer sea surface temperature towards the peak of the interglacial occurs too early (at 128 kyr BP) compared to the reconstructions. This feature as well as the climate simulated during the optimum of the LIG, between 131 and 121 kyr BP, does not depend on changes in surface boundary conditions and parameter sets. The additional freshwater flux (FWF) from the melting NH ice sheets is responsible for a temporary abrupt weakening of the North Atlantic meridional overturning circulation,which causes a strong global cooling in annual mean. However, the changes in the configuration (extent and albedo)of the NH ice sheets during the LIG only slightly impact the simulated climate. Together, ... Article in Journal/Newspaper North Atlantic Sea ice DIAL@USL-B (Université Saint-Louis, Bruxelles) Climate of the Past 10 4 1541 1565 |
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DIAL@USL-B (Université Saint-Louis, Bruxelles) |
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ftunistlouisbrus |
language |
English |
topic |
CISM:CECI 1443 |
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CISM:CECI 1443 Loutre, Marie-France Fichefet, Thierry Goosse, Hugues Huybrechts, P. Goelzer, H. Capron, E. Factors controlling the last interglacial climate as simulated by LOVECLIM1.3 |
topic_facet |
CISM:CECI 1443 |
description |
The last interglacial (LIG), also identified to the Eemian in Europe, began at approximately 130 kyr BP and ended at about 115 kyr BP (before present). More and more proxy-based reconstructions of the LIG climate are becoming more available even though they remain sparse. The major climate forcings during the LIG are rather well known and therefore models can be tested against paleoclimatic data sets and then used to better understand the climate of the LIG. However, models are displaying a large range of responses,being sometimes contradictory between them or with the reconstructed data. Here we would like to investigate causes of these differences. We focus on a single climate model, LOVECLIM, and we perform transient simulations over the LIG, starting at 135 kyr BP and run until 115 kyr BP. With these simulations, we test the role of the surface boundary conditions (the time-evolution of the Northern Hemisphere (NH) ice sheets) on the simulated LIG climate and the importance of the parameter sets (internal to the model, such as the albedos of the ocean and sea ice), which affect the sensitivity of the model. The magnitude of the simulated climate variations through the LIG remains too low compared to reconstructions for climate variables such as surface air temperature. Moreover, in the North Atlantic, the large increase in summer sea surface temperature towards the peak of the interglacial occurs too early (at 128 kyr BP) compared to the reconstructions. This feature as well as the climate simulated during the optimum of the LIG, between 131 and 121 kyr BP, does not depend on changes in surface boundary conditions and parameter sets. The additional freshwater flux (FWF) from the melting NH ice sheets is responsible for a temporary abrupt weakening of the North Atlantic meridional overturning circulation,which causes a strong global cooling in annual mean. However, the changes in the configuration (extent and albedo)of the NH ice sheets during the LIG only slightly impact the simulated climate. Together, ... |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Loutre, Marie-France Fichefet, Thierry Goosse, Hugues Huybrechts, P. Goelzer, H. Capron, E. |
author_facet |
Loutre, Marie-France Fichefet, Thierry Goosse, Hugues Huybrechts, P. Goelzer, H. Capron, E. |
author_sort |
Loutre, Marie-France |
title |
Factors controlling the last interglacial climate as simulated by LOVECLIM1.3 |
title_short |
Factors controlling the last interglacial climate as simulated by LOVECLIM1.3 |
title_full |
Factors controlling the last interglacial climate as simulated by LOVECLIM1.3 |
title_fullStr |
Factors controlling the last interglacial climate as simulated by LOVECLIM1.3 |
title_full_unstemmed |
Factors controlling the last interglacial climate as simulated by LOVECLIM1.3 |
title_sort |
factors controlling the last interglacial climate as simulated by loveclim1.3 |
publisher |
Copernicus GmbH |
publishDate |
2014 |
url |
http://hdl.handle.net/2078.1/150199 https://doi.org/10.5194/cp-10-1541-2014 |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_source |
Climate of the Past, Vol. 10, no.4, p. 1541-1565 (2014) |
op_relation |
boreal:150199 http://hdl.handle.net/2078.1/150199 doi:10.5194/cp-10-1541-2014 urn:ISSN:1814-9324 urn:EISSN:1814-9332 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-10-1541-2014 |
container_title |
Climate of the Past |
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10 |
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4 |
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1541 |
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1565 |
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