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...
Published in: | The Cryosphere |
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Language: | English |
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2013
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Online Access: | https://www.vliz.be/imisdocs/publications/257640.pdf |
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ftvliz:oai:oma.vliz.be:238633 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 application/pdf https://www.vliz.be/imisdocs/publications/257640.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000317005500001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/tc-7-395-2013 https://www.vliz.be/imisdocs/publications/257640.pdf info:eu-repo/semantics/openAccess %3Ci%3ECryosphere+7%282%29%3C%2Fi%3E%3A+395-406.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-7-395-2013%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-7-395-2013%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftvliz https://doi.org/10.5194/tc-7-395-2013 2022-05-01T10:16:21Z 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 Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) The Cryosphere 7 2 395 406 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
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 |
publishDate |
2013 |
url |
https://www.vliz.be/imisdocs/publications/257640.pdf |
genre |
Ice Sheet Ice Shelf |
genre_facet |
Ice Sheet Ice Shelf |
op_source |
%3Ci%3ECryosphere+7%282%29%3C%2Fi%3E%3A+395-406.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-7-395-2013%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-7-395-2013%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000317005500001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/tc-7-395-2013 https://www.vliz.be/imisdocs/publications/257640.pdf |
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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1766029906041372672 |