Grounding line transient response in marine ice sheet models
Marine ice-sheet stability is mostly controlled by the dynamics of the grounding line, i.e. the junction between the grounded ice sheet and the floating ice shelf. Grounding line migration has been investigated within the framework of MISMIP (Marine Ice Sheet Model Intercomparison Project), which ma...
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Online Access: | http://hdl.handle.net/2078/167214 https://doi.org/10.5194/tc-7-395-2013 |
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ftunivlouvain:oai:dial.uclouvain.be:boreal:167214 2024-05-12T08:05:15+00:00 Grounding line transient response in marine ice sheet models Drouet, A. S. Docquier, David Durand, G. Hindmarsh, R. Pattyn, F. Gagliardini, O. Zwinger, T. UJF - Grenoble 1/CNRS - Laboratoire de Glaciologie et Géophysique de l’Environnement Université Libre de Bruxelles - Laboratoire de Glaciologie British Antarctic Survey - Natural Environment Research Council Institut Universitaire de France - Institut Universitaire de France CSC-IT Center for Science Ltd. - CSC-IT Center for Science Ltd. UCL - SST/ELI/ELIC - Earth & Climate 2013 http://hdl.handle.net/2078/167214 https://doi.org/10.5194/tc-7-395-2013 eng eng Copernicus GmbH boreal:167214 http://hdl.handle.net/2078/167214 doi:10.5194/tc-7-395-2013 urn:ISSN:1994-0416 urn:EISSN:1994-0424 info:eu-repo/semantics/openAccess The Cryosphere, Vol. 7, no.2, p. 395-406 (2013) grounding line transient ice sheet modeling Schoof info:eu-repo/semantics/article 2013 ftunivlouvain https://doi.org/10.5194/tc-7-395-2013 2024-04-17T17:07:53Z Marine ice-sheet stability is mostly controlled by the dynamics of the grounding line, i.e. the junction between the grounded ice sheet and the floating ice shelf. Grounding line migration has been investigated within the framework of MISMIP (Marine Ice Sheet Model Intercomparison Project), which mainly aimed at investigating steady state solutions. Here we focus on transient behaviour, executing short-term simulations (200 yr) of a steady ice sheet perturbed by the release of the buttressing restraint exerted by the ice shelf on the grounded ice upstream. The transient grounding line behaviour of four different flowline ice-sheet models has been compared. The models differ in the physics implemented (full Stokes and shallow shelf approximation), the numerical approach, as well as the grounding line treatment. Their overall response to the loss of buttressing is found to be broadly consistent in terms of grounding line position, rate of surface elevation change and surface velocity. However, still small differences appear for these latter variables, and they can lead to large discrepancies (> 100%) observed in terms of ice sheet contribution to sea level when cumulated over time. Despite the recent important improvements of marine ice-sheet models in their ability to compute steady state configurations, our results question the capacity of these models to compute short-term reliable sea-level rise projections. Article in Journal/Newspaper Ice Sheet Ice Shelf The Cryosphere DIAL@UCLouvain (Université catholique de Louvain) The Cryosphere 7 2 395 406 |
institution |
Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
topic |
grounding line transient ice sheet modeling Schoof |
spellingShingle |
grounding line transient ice sheet modeling Schoof Drouet, A. S. Docquier, David Durand, G. Hindmarsh, R. Pattyn, F. Gagliardini, O. Zwinger, T. Grounding line transient response in marine ice sheet models |
topic_facet |
grounding line transient ice sheet modeling Schoof |
description |
Marine ice-sheet stability is mostly controlled by the dynamics of the grounding line, i.e. the junction between the grounded ice sheet and the floating ice shelf. Grounding line migration has been investigated within the framework of MISMIP (Marine Ice Sheet Model Intercomparison Project), which mainly aimed at investigating steady state solutions. Here we focus on transient behaviour, executing short-term simulations (200 yr) of a steady ice sheet perturbed by the release of the buttressing restraint exerted by the ice shelf on the grounded ice upstream. The transient grounding line behaviour of four different flowline ice-sheet models has been compared. The models differ in the physics implemented (full Stokes and shallow shelf approximation), the numerical approach, as well as the grounding line treatment. Their overall response to the loss of buttressing is found to be broadly consistent in terms of grounding line position, rate of surface elevation change and surface velocity. However, still small differences appear for these latter variables, and they can lead to large discrepancies (> 100%) observed in terms of ice sheet contribution to sea level when cumulated over time. Despite the recent important improvements of marine ice-sheet models in their ability to compute steady state configurations, our results question the capacity of these models to compute short-term reliable sea-level rise projections. |
author2 |
UJF - Grenoble 1/CNRS - Laboratoire de Glaciologie et Géophysique de l’Environnement Université Libre de Bruxelles - Laboratoire de Glaciologie British Antarctic Survey - Natural Environment Research Council Institut Universitaire de France - Institut Universitaire de France CSC-IT Center for Science Ltd. - CSC-IT Center for Science Ltd. UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Drouet, A. S. Docquier, David Durand, G. Hindmarsh, R. Pattyn, F. Gagliardini, O. Zwinger, T. |
author_facet |
Drouet, A. S. Docquier, David Durand, G. Hindmarsh, R. Pattyn, F. Gagliardini, O. Zwinger, T. |
author_sort |
Drouet, A. S. |
title |
Grounding line transient response in marine ice sheet models |
title_short |
Grounding line transient response in marine ice sheet models |
title_full |
Grounding line transient response in marine ice sheet models |
title_fullStr |
Grounding line transient response in marine ice sheet models |
title_full_unstemmed |
Grounding line transient response in marine ice sheet models |
title_sort |
grounding line transient response in marine ice sheet models |
publisher |
Copernicus GmbH |
publishDate |
2013 |
url |
http://hdl.handle.net/2078/167214 https://doi.org/10.5194/tc-7-395-2013 |
genre |
Ice Sheet Ice Shelf The Cryosphere |
genre_facet |
Ice Sheet Ice Shelf The Cryosphere |
op_source |
The Cryosphere, Vol. 7, no.2, p. 395-406 (2013) |
op_relation |
boreal:167214 http://hdl.handle.net/2078/167214 doi:10.5194/tc-7-395-2013 urn:ISSN:1994-0416 urn:EISSN:1994-0424 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-7-395-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
2 |
container_start_page |
395 |
op_container_end_page |
406 |
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1798847516092923904 |