Coupled climate-glacier modelling of the last glaciation in the Alps
Abstract Our limited knowledge of the climate prevailing over Europe during former glaciations is the main obstacle to reconstruct the past evolution of the ice coverage over the Alps by numerical modelling. To address this challenge, we perform a two-step modelling approach: First, a regional clima...
Published in: | Journal of Glaciology |
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Cambridge University Press (CUP)
2023
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Online Access: | http://dx.doi.org/10.1017/jog.2023.74 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000746 |
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crcambridgeupr:10.1017/jog.2023.74 2024-06-23T07:53:48+00:00 Coupled climate-glacier modelling of the last glaciation in the Alps Jouvet, Guillaume Cohen, Denis Russo, Emmanuele Buzan, Jonathan Raible, Christoph C. Haeberli, Wilfried Kamleitner, Sarah Ivy-Ochs, Susan Imhof, Michael A. Becker, Jens K. Landgraf, Angela Fischer, Urs H. Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung 2023 http://dx.doi.org/10.1017/jog.2023.74 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000746 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology page 1-15 ISSN 0022-1430 1727-5652 journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2023.74 2024-05-29T08:09:02Z Abstract Our limited knowledge of the climate prevailing over Europe during former glaciations is the main obstacle to reconstruct the past evolution of the ice coverage over the Alps by numerical modelling. To address this challenge, we perform a two-step modelling approach: First, a regional climate model is used to downscale the time slice simulations of a global earth system model in high resolution, leading to climate snapshots during the Last Glacial Maximum (LGM) and the Marine Isotope Stage 4 (MIS4). Second, we combine these snapshots and a climate signal proxy to build a transient climate over the last glacial period and force the Parallel Ice Sheet Model to simulate the dynamical evolution of glaciers in the Alps. The results show that the extent of modelled glaciers during the LGM agrees with several independent key geological imprints, including moraine-based maximal reconstructed glacial extents, known ice transfluences and trajectories of erratic boulders of known origin and deposition. Our results highlight the benefit of multiphysical coupled climate and glacier transient modelling over simpler approaches to help reconstruct paleo glacier fluctuations in agreement with traces they have left on the landscape. Article in Journal/Newspaper Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 1 15 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Our limited knowledge of the climate prevailing over Europe during former glaciations is the main obstacle to reconstruct the past evolution of the ice coverage over the Alps by numerical modelling. To address this challenge, we perform a two-step modelling approach: First, a regional climate model is used to downscale the time slice simulations of a global earth system model in high resolution, leading to climate snapshots during the Last Glacial Maximum (LGM) and the Marine Isotope Stage 4 (MIS4). Second, we combine these snapshots and a climate signal proxy to build a transient climate over the last glacial period and force the Parallel Ice Sheet Model to simulate the dynamical evolution of glaciers in the Alps. The results show that the extent of modelled glaciers during the LGM agrees with several independent key geological imprints, including moraine-based maximal reconstructed glacial extents, known ice transfluences and trajectories of erratic boulders of known origin and deposition. Our results highlight the benefit of multiphysical coupled climate and glacier transient modelling over simpler approaches to help reconstruct paleo glacier fluctuations in agreement with traces they have left on the landscape. |
author2 |
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung |
format |
Article in Journal/Newspaper |
author |
Jouvet, Guillaume Cohen, Denis Russo, Emmanuele Buzan, Jonathan Raible, Christoph C. Haeberli, Wilfried Kamleitner, Sarah Ivy-Ochs, Susan Imhof, Michael A. Becker, Jens K. Landgraf, Angela Fischer, Urs H. |
spellingShingle |
Jouvet, Guillaume Cohen, Denis Russo, Emmanuele Buzan, Jonathan Raible, Christoph C. Haeberli, Wilfried Kamleitner, Sarah Ivy-Ochs, Susan Imhof, Michael A. Becker, Jens K. Landgraf, Angela Fischer, Urs H. Coupled climate-glacier modelling of the last glaciation in the Alps |
author_facet |
Jouvet, Guillaume Cohen, Denis Russo, Emmanuele Buzan, Jonathan Raible, Christoph C. Haeberli, Wilfried Kamleitner, Sarah Ivy-Ochs, Susan Imhof, Michael A. Becker, Jens K. Landgraf, Angela Fischer, Urs H. |
author_sort |
Jouvet, Guillaume |
title |
Coupled climate-glacier modelling of the last glaciation in the Alps |
title_short |
Coupled climate-glacier modelling of the last glaciation in the Alps |
title_full |
Coupled climate-glacier modelling of the last glaciation in the Alps |
title_fullStr |
Coupled climate-glacier modelling of the last glaciation in the Alps |
title_full_unstemmed |
Coupled climate-glacier modelling of the last glaciation in the Alps |
title_sort |
coupled climate-glacier modelling of the last glaciation in the alps |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2023.74 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000746 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology page 1-15 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2023.74 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
15 |
_version_ |
1802645637504696320 |