Last Interglacial climate and sea-level evolution from a coupled ice sheet–climate model
As the most recent warm period in Earth’s history with a sea-level stand higher than present, the Last Interglacial(LIG, ∼ 130 to 115 kyr BP) is often considered a prime example to study the impact of a warmer climate on the two polar ice sheets remaining today. Here we simulate the Last Intergl...
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ftunivlouvain:oai:dial.uclouvain.be:boreal:179087 2024-05-12T07:56:31+00:00 Last Interglacial climate and sea-level evolution from a coupled ice sheet–climate model Goelzer, Heiko Huybrechts, Philippe Loutre, Marie-France Fichefet, Thierry UCL - SST/ELI/ELIC - Earth & Climate 2016 http://hdl.handle.net/2078.1/179087 https://doi.org/10.5194/cp-12-2195-2016 eng eng Copernicus GmbH boreal:179087 http://hdl.handle.net/2078.1/179087 doi:10.5194/cp-12-2195-2016 urn:ISSN:1814-9324 urn:EISSN:1814-9332 info:eu-repo/semantics/openAccess Climate of the Past, Vol. 12, no.12, p. 2195-2213 (2016) CISM:CECI 1443 info:eu-repo/semantics/article 2016 ftunivlouvain https://doi.org/10.5194/cp-12-2195-2016 2024-04-17T17:01:29Z As the most recent warm period in Earth’s history with a sea-level stand higher than present, the Last Interglacial(LIG, ∼ 130 to 115 kyr BP) is often considered a prime example to study the impact of a warmer climate on the two polar ice sheets remaining today. Here we simulate the Last Interglacial climate, ice sheet, and sea-level evolution with the Earth system model of intermediate complexity LOVECLIM v.1.3, which includes dynamic and fully coupled components representing the atmosphere, the ocean and sea ice, the terrestrial biosphere, and the Greenland and Antarctic ice sheets. In this setup, sea-level evolution and climate–ice sheet interactions are modelled in a consistent framework. Surface mass balance change governed by changes in surface meltwater runoff is the dominant forcing for the Greenland ice sheet, which shows a peak sea-level contribution of 1.4 m at 123 kyr BP in the reference experiment. Our results indicate that ice sheet–climate feedbacks play an important role to amplify climate and sea-level changes in the Northern Hemisphere. The sensitivity of the Greenland ice sheet to surface temperature changes considerably increases when interactive albedo changes are considered. Southern Hemisphere polar and sub-polar ocean warming is limited throughout the Last Interglacial, and surface and sub-shelf melting exerts only a minor control on the Antarctic sea-level contribution with a peak of 4.4 m at 125 kyr BP. Retreat of the Antarctic ice sheet at the onset of the LIG is mainly forced by rising sea level and to a lesser extent by reduced ice shelf viscosity as the surface temperature increases. Global sea level shows a peak of 5.3 m at 124.5 kyr BP, which includes a minor contribution of 0.35 m from oceanic thermal expansion. Neither the individual contributions nor the total modelled sea-level stand show fast multi-millennial timescale variations as indicated by some reconstructions. Article in Journal/Newspaper Antarc* Antarctic Greenland Ice Sheet Ice Shelf Sea ice DIAL@UCLouvain (Université catholique de Louvain) Antarctic The Antarctic Greenland Climate of the Past 12 12 2195 2213 |
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Open Polar |
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DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
topic |
CISM:CECI 1443 |
spellingShingle |
CISM:CECI 1443 Goelzer, Heiko Huybrechts, Philippe Loutre, Marie-France Fichefet, Thierry Last Interglacial climate and sea-level evolution from a coupled ice sheet–climate model |
topic_facet |
CISM:CECI 1443 |
description |
As the most recent warm period in Earth’s history with a sea-level stand higher than present, the Last Interglacial(LIG, ∼ 130 to 115 kyr BP) is often considered a prime example to study the impact of a warmer climate on the two polar ice sheets remaining today. Here we simulate the Last Interglacial climate, ice sheet, and sea-level evolution with the Earth system model of intermediate complexity LOVECLIM v.1.3, which includes dynamic and fully coupled components representing the atmosphere, the ocean and sea ice, the terrestrial biosphere, and the Greenland and Antarctic ice sheets. In this setup, sea-level evolution and climate–ice sheet interactions are modelled in a consistent framework. Surface mass balance change governed by changes in surface meltwater runoff is the dominant forcing for the Greenland ice sheet, which shows a peak sea-level contribution of 1.4 m at 123 kyr BP in the reference experiment. Our results indicate that ice sheet–climate feedbacks play an important role to amplify climate and sea-level changes in the Northern Hemisphere. The sensitivity of the Greenland ice sheet to surface temperature changes considerably increases when interactive albedo changes are considered. Southern Hemisphere polar and sub-polar ocean warming is limited throughout the Last Interglacial, and surface and sub-shelf melting exerts only a minor control on the Antarctic sea-level contribution with a peak of 4.4 m at 125 kyr BP. Retreat of the Antarctic ice sheet at the onset of the LIG is mainly forced by rising sea level and to a lesser extent by reduced ice shelf viscosity as the surface temperature increases. Global sea level shows a peak of 5.3 m at 124.5 kyr BP, which includes a minor contribution of 0.35 m from oceanic thermal expansion. Neither the individual contributions nor the total modelled sea-level stand show fast multi-millennial timescale variations as indicated by some reconstructions. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Goelzer, Heiko Huybrechts, Philippe Loutre, Marie-France Fichefet, Thierry |
author_facet |
Goelzer, Heiko Huybrechts, Philippe Loutre, Marie-France Fichefet, Thierry |
author_sort |
Goelzer, Heiko |
title |
Last Interglacial climate and sea-level evolution from a coupled ice sheet–climate model |
title_short |
Last Interglacial climate and sea-level evolution from a coupled ice sheet–climate model |
title_full |
Last Interglacial climate and sea-level evolution from a coupled ice sheet–climate model |
title_fullStr |
Last Interglacial climate and sea-level evolution from a coupled ice sheet–climate model |
title_full_unstemmed |
Last Interglacial climate and sea-level evolution from a coupled ice sheet–climate model |
title_sort |
last interglacial climate and sea-level evolution from a coupled ice sheet–climate model |
publisher |
Copernicus GmbH |
publishDate |
2016 |
url |
http://hdl.handle.net/2078.1/179087 https://doi.org/10.5194/cp-12-2195-2016 |
geographic |
Antarctic The Antarctic Greenland |
geographic_facet |
Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic Greenland Ice Sheet Ice Shelf Sea ice |
genre_facet |
Antarc* Antarctic Greenland Ice Sheet Ice Shelf Sea ice |
op_source |
Climate of the Past, Vol. 12, no.12, p. 2195-2213 (2016) |
op_relation |
boreal:179087 http://hdl.handle.net/2078.1/179087 doi:10.5194/cp-12-2195-2016 urn:ISSN:1814-9324 urn:EISSN:1814-9332 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-12-2195-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
12 |
container_start_page |
2195 |
op_container_end_page |
2213 |
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1798836617406840832 |