Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle
A 2.5-dimensional climate model of intermediate complexity, CLIMBER-2, fully coupled with the GREMLINS 3-D thermo-mechanical ice sheet model is used to simulate the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle and to investigate the ice sheets response...
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fttriple:oai:gotriple.eu:10670/1.1jpycv 2023-05-15T16:40:33+02:00 Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle Bonelli, S. Charbit, S. Kageyama, M. Woillez, M.-N. Ramstein, G. Dumas, C. Quiquet, A. 2018-09-27 https://doi.org/10.5194/cp-5-329-2009 https://cp.copernicus.org/articles/5/329/2009/ en eng doi:10.5194/cp-5-329-2009 10670/1.1jpycv https://cp.copernicus.org/articles/5/329/2009/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2018 fttriple https://doi.org/10.5194/cp-5-329-2009 2023-01-22T16:47:19Z A 2.5-dimensional climate model of intermediate complexity, CLIMBER-2, fully coupled with the GREMLINS 3-D thermo-mechanical ice sheet model is used to simulate the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle and to investigate the ice sheets responses to both insolation and atmospheric CO2 concentration. This model reproduces the main phases of advance and retreat of Northern Hemisphere ice sheets during the last glacial cycle, although the amplitude of these variations is less pronounced than those based on sea level reconstructions. At the last glacial maximum, the simulated ice volume is 52.5×1015 m3 and the spatial distribution of both the American and Eurasian ice complexes is in reasonable agreement with observations, with the exception of the marine parts of these former ice sheets. A set of sensitivity studies has also been performed to assess the sensitivity of the Northern Hemisphere ice sheets to both insolation and atmospheric CO2. Our results suggest that the decrease of summer insolation is the main factor responsible for the early build up of the North American ice sheet around 120 kyr BP, in agreement with benthic foraminifera δ18O signals. In contrast, low insolation and low atmospheric CO2 concentration are both necessary to trigger a long-lasting glaciation over Eurasia. Text Ice Sheet Unknown Climate of the Past 5 3 329 345 |
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geo envir Bonelli, S. Charbit, S. Kageyama, M. Woillez, M.-N. Ramstein, G. Dumas, C. Quiquet, A. Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle |
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A 2.5-dimensional climate model of intermediate complexity, CLIMBER-2, fully coupled with the GREMLINS 3-D thermo-mechanical ice sheet model is used to simulate the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle and to investigate the ice sheets responses to both insolation and atmospheric CO2 concentration. This model reproduces the main phases of advance and retreat of Northern Hemisphere ice sheets during the last glacial cycle, although the amplitude of these variations is less pronounced than those based on sea level reconstructions. At the last glacial maximum, the simulated ice volume is 52.5×1015 m3 and the spatial distribution of both the American and Eurasian ice complexes is in reasonable agreement with observations, with the exception of the marine parts of these former ice sheets. A set of sensitivity studies has also been performed to assess the sensitivity of the Northern Hemisphere ice sheets to both insolation and atmospheric CO2. Our results suggest that the decrease of summer insolation is the main factor responsible for the early build up of the North American ice sheet around 120 kyr BP, in agreement with benthic foraminifera δ18O signals. In contrast, low insolation and low atmospheric CO2 concentration are both necessary to trigger a long-lasting glaciation over Eurasia. |
format |
Text |
author |
Bonelli, S. Charbit, S. Kageyama, M. Woillez, M.-N. Ramstein, G. Dumas, C. Quiquet, A. |
author_facet |
Bonelli, S. Charbit, S. Kageyama, M. Woillez, M.-N. Ramstein, G. Dumas, C. Quiquet, A. |
author_sort |
Bonelli, S. |
title |
Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle |
title_short |
Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle |
title_full |
Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle |
title_fullStr |
Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle |
title_full_unstemmed |
Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle |
title_sort |
investigating the evolution of major northern hemisphere ice sheets during the last glacial-interglacial cycle |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-5-329-2009 https://cp.copernicus.org/articles/5/329/2009/ |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-5-329-2009 10670/1.1jpycv https://cp.copernicus.org/articles/5/329/2009/ |
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undefined |
op_doi |
https://doi.org/10.5194/cp-5-329-2009 |
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Climate of the Past |
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5 |
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3 |
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329 |
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345 |
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1766030961708892160 |