Numerical reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle
A 3-dimensional thermo-mechanical ice-sheet model is used to simulate the evolution of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle. The ice-sheet model is forced by the results from six different atmospheric general circulation models (AGCMs). The climate evolution...
Published in: | Climate of the Past |
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Copernicus Publications
2007
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00032682 2023-05-15T16:40:15+02:00 Numerical reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle Charbit, S. Ritz, C. Philippon, G. Peyaud, V. Kageyama, M. 2007-01 electronic https://doi.org/10.5194/cp-3-15-2007 https://noa.gwlb.de/receive/cop_mods_00032682 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032636/cp-3-15-2007.pdf https://cp.copernicus.org/articles/3/15/2007/cp-3-15-2007.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-3-15-2007 https://noa.gwlb.de/receive/cop_mods_00032682 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032636/cp-3-15-2007.pdf https://cp.copernicus.org/articles/3/15/2007/cp-3-15-2007.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2007 ftnonlinearchiv https://doi.org/10.5194/cp-3-15-2007 2022-02-08T22:46:09Z A 3-dimensional thermo-mechanical ice-sheet model is used to simulate the evolution of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle. The ice-sheet model is forced by the results from six different atmospheric general circulation models (AGCMs). The climate evolution over the period under study is reconstructed using two climate equilibrium simulations performed for the Last Glacial Maximum (LGM) and for the present-day periods and an interpolation through time between these snapshots using a glacial index calibrated against the GRIP δ18O record. Since it is driven by the timing of the GRIP signal, the temporal evolution of the ice volume and the ice-covered area is approximately the same from one simulation to the other. However, both ice volume curves and spatial distributions of the ice sheets present some major differences from one AGCM forcing to the other. The origin of these differences, which are most visible in the maximum amplitude of the ice volume, is analyzed in terms of differences in climate forcing. This analysis allows for a partial evaluation of the ability of GCMs to simulate climates consistent with the reconstructions of past ice sheets. Although some models properly reproduce the advance or retreat of ice sheets in some specific areas, none of them is able to reproduce both North American or Eurasian ice complexes in full agreement with observed sea-level variations and geological data. These deviations can be attributed to shortcomings in the climate forcing and in the LGM ice-sheet reconstruction used as a boundary condition for GCM runs, but also to missing processes in the ice-sheet model itself. Article in Journal/Newspaper Ice Sheet Niedersächsisches Online-Archiv NOA Climate of the Past 3 1 15 37 |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Charbit, S. Ritz, C. Philippon, G. Peyaud, V. Kageyama, M. Numerical reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle |
topic_facet |
article Verlagsveröffentlichung |
description |
A 3-dimensional thermo-mechanical ice-sheet model is used to simulate the evolution of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle. The ice-sheet model is forced by the results from six different atmospheric general circulation models (AGCMs). The climate evolution over the period under study is reconstructed using two climate equilibrium simulations performed for the Last Glacial Maximum (LGM) and for the present-day periods and an interpolation through time between these snapshots using a glacial index calibrated against the GRIP δ18O record. Since it is driven by the timing of the GRIP signal, the temporal evolution of the ice volume and the ice-covered area is approximately the same from one simulation to the other. However, both ice volume curves and spatial distributions of the ice sheets present some major differences from one AGCM forcing to the other. The origin of these differences, which are most visible in the maximum amplitude of the ice volume, is analyzed in terms of differences in climate forcing. This analysis allows for a partial evaluation of the ability of GCMs to simulate climates consistent with the reconstructions of past ice sheets. Although some models properly reproduce the advance or retreat of ice sheets in some specific areas, none of them is able to reproduce both North American or Eurasian ice complexes in full agreement with observed sea-level variations and geological data. These deviations can be attributed to shortcomings in the climate forcing and in the LGM ice-sheet reconstruction used as a boundary condition for GCM runs, but also to missing processes in the ice-sheet model itself. |
format |
Article in Journal/Newspaper |
author |
Charbit, S. Ritz, C. Philippon, G. Peyaud, V. Kageyama, M. |
author_facet |
Charbit, S. Ritz, C. Philippon, G. Peyaud, V. Kageyama, M. |
author_sort |
Charbit, S. |
title |
Numerical reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle |
title_short |
Numerical reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle |
title_full |
Numerical reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle |
title_fullStr |
Numerical reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle |
title_full_unstemmed |
Numerical reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle |
title_sort |
numerical reconstructions of the northern hemisphere ice sheets through the last glacial-interglacial cycle |
publisher |
Copernicus Publications |
publishDate |
2007 |
url |
https://doi.org/10.5194/cp-3-15-2007 https://noa.gwlb.de/receive/cop_mods_00032682 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032636/cp-3-15-2007.pdf https://cp.copernicus.org/articles/3/15/2007/cp-3-15-2007.pdf |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-3-15-2007 https://noa.gwlb.de/receive/cop_mods_00032682 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032636/cp-3-15-2007.pdf https://cp.copernicus.org/articles/3/15/2007/cp-3-15-2007.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-3-15-2007 |
container_title |
Climate of the Past |
container_volume |
3 |
container_issue |
1 |
container_start_page |
15 |
op_container_end_page |
37 |
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1766030635804131328 |