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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Copernicus Publications on behalf of the European Geosciences Union
2013
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Online Access: | http://nora.nerc.ac.uk/id/eprint/501785/ https://nora.nerc.ac.uk/id/eprint/501785/1/tc-7-395-2013.pdf https://doi.org/10.5194/tc-7-395-2013 |
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ftnerc:oai:nora.nerc.ac.uk:501785 2023-05-15T16:39:34+02:00 Grounding line transient response in marine ice sheet models Drouet, A. S. Docquier, D. Durand, G. Hindmarsh, R. Pattyn, F. Gagliardini, O. Zwinger, T. 2013-03-01 text http://nora.nerc.ac.uk/id/eprint/501785/ https://nora.nerc.ac.uk/id/eprint/501785/1/tc-7-395-2013.pdf https://doi.org/10.5194/tc-7-395-2013 en eng Copernicus Publications on behalf of the European Geosciences Union https://nora.nerc.ac.uk/id/eprint/501785/1/tc-7-395-2013.pdf Drouet, A. S.; Docquier, D.; Durand, G.; Hindmarsh, R. orcid:0000-0003-1633-2416 Pattyn, F.; Gagliardini, O.; Zwinger, T. 2013 Grounding line transient response in marine ice sheet models. The Cryosphere, 7 (2). 395-406. https://doi.org/10.5194/tc-7-395-2013 <https://doi.org/10.5194/tc-7-395-2013> Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.5194/tc-7-395-2013 2023-02-04T19:36:56Z 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 Natural Environment Research Council: NERC Open Research Archive The Cryosphere 7 2 395 406 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Drouet, A. S. Docquier, D. Durand, G. Hindmarsh, R. Pattyn, F. Gagliardini, O. Zwinger, T. |
spellingShingle |
Drouet, A. S. Docquier, D. Durand, G. Hindmarsh, R. Pattyn, F. Gagliardini, O. Zwinger, T. Grounding line transient response in marine ice sheet models |
author_facet |
Drouet, A. S. Docquier, D. 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 Publications on behalf of the European Geosciences Union |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/501785/ https://nora.nerc.ac.uk/id/eprint/501785/1/tc-7-395-2013.pdf 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_relation |
https://nora.nerc.ac.uk/id/eprint/501785/1/tc-7-395-2013.pdf Drouet, A. S.; Docquier, D.; Durand, G.; Hindmarsh, R. orcid:0000-0003-1633-2416 Pattyn, F.; Gagliardini, O.; Zwinger, T. 2013 Grounding line transient response in marine ice sheet models. The Cryosphere, 7 (2). 395-406. https://doi.org/10.5194/tc-7-395-2013 <https://doi.org/10.5194/tc-7-395-2013> |
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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1766029905864163328 |