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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ftdoajarticles:oai:doaj.org/article:4ffc0f651c7a4c15be66e867f202fd91 2023-05-15T16:39:35+02:00 Grounding line transient response in marine ice sheet models A. S. Drouet D. Docquier G. Durand R. Hindmarsh F. Pattyn O. Gagliardini T. Zwinger 2013-03-01T00:00:00Z https://doi.org/10.5194/tc-7-395-2013 https://doaj.org/article/4ffc0f651c7a4c15be66e867f202fd91 EN eng Copernicus Publications http://www.the-cryosphere.net/7/395/2013/tc-7-395-2013.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-7-395-2013 1994-0416 1994-0424 https://doaj.org/article/4ffc0f651c7a4c15be66e867f202fd91 The Cryosphere, Vol 7, Iss 2, Pp 395-406 (2013) Environmental sciences GE1-350 Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/tc-7-395-2013 2022-12-31T00:43:58Z 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 Directory of Open Access Journals: DOAJ Articles The Cryosphere 7 2 395 406 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 A. S. Drouet D. Docquier G. Durand R. Hindmarsh F. Pattyn O. Gagliardini T. Zwinger Grounding line transient response in marine ice sheet models |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 |
A. S. Drouet D. Docquier G. Durand R. Hindmarsh F. Pattyn O. Gagliardini T. Zwinger |
author_facet |
A. S. Drouet D. Docquier G. Durand R. Hindmarsh F. Pattyn O. Gagliardini T. Zwinger |
author_sort |
A. S. Drouet |
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 |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-395-2013 https://doaj.org/article/4ffc0f651c7a4c15be66e867f202fd91 |
genre |
Ice Sheet Ice Shelf The Cryosphere |
genre_facet |
Ice Sheet Ice Shelf The Cryosphere |
op_source |
The Cryosphere, Vol 7, Iss 2, Pp 395-406 (2013) |
op_relation |
http://www.the-cryosphere.net/7/395/2013/tc-7-395-2013.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-7-395-2013 1994-0416 1994-0424 https://doaj.org/article/4ffc0f651c7a4c15be66e867f202fd91 |
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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1766029915088486400 |