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...
Main Authors: | , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2009
|
Subjects: | |
Online Access: | http://www.clim-past.net/5/329/2009/cp-5-329-2009.pdf https://doaj.org/article/0948aadc3f7e4e8b88e3b30acc151aaa |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:0948aadc3f7e4e8b88e3b30acc151aaa |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:0948aadc3f7e4e8b88e3b30acc151aaa 2023-05-15T16:40:33+02:00 Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle S. Bonelli S. Charbit M. Kageyama M.-N. Woillez G. Ramstein C. Dumas A. Quiquet 2009-07-01 http://www.clim-past.net/5/329/2009/cp-5-329-2009.pdf https://doaj.org/article/0948aadc3f7e4e8b88e3b30acc151aaa en eng Copernicus Publications 1814-9324 1814-9332 http://www.clim-past.net/5/329/2009/cp-5-329-2009.pdf https://doaj.org/article/0948aadc3f7e4e8b88e3b30acc151aaa undefined Climate of the Past, Vol 5, Iss 3, Pp 329-345 (2009) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2009 fttriple 2023-01-22T17:32:58Z 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. Article in Journal/Newspaper Ice Sheet Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir S. Bonelli S. Charbit M. Kageyama M.-N. Woillez G. Ramstein C. Dumas A. Quiquet Investigating the evolution of major Northern Hemisphere ice sheets during the last glacial-interglacial cycle |
topic_facet |
geo envir |
description |
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 |
Article in Journal/Newspaper |
author |
S. Bonelli S. Charbit M. Kageyama M.-N. Woillez G. Ramstein C. Dumas A. Quiquet |
author_facet |
S. Bonelli S. Charbit M. Kageyama M.-N. Woillez G. Ramstein C. Dumas A. Quiquet |
author_sort |
S. Bonelli |
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 |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
http://www.clim-past.net/5/329/2009/cp-5-329-2009.pdf https://doaj.org/article/0948aadc3f7e4e8b88e3b30acc151aaa |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Climate of the Past, Vol 5, Iss 3, Pp 329-345 (2009) |
op_relation |
1814-9324 1814-9332 http://www.clim-past.net/5/329/2009/cp-5-329-2009.pdf https://doaj.org/article/0948aadc3f7e4e8b88e3b30acc151aaa |
op_rights |
undefined |
_version_ |
1766030955651268608 |