Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics
Increase in ice-shelf melting is generally presumed to have triggered recent coastal ice-sheet thinning. Using a full-Stokes finite element model which includes a proper description of the grounding line dynamics, we investigate the impact of melting below ice shelves. We argue that the influence of...
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American Geophysical Union
2010
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ftnerc:oai:nora.nerc.ac.uk:10843 2023-05-15T16:40:30+02:00 Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics Gagliardini, O. Durand, G. Zwinger, T. Hindmarsh, R.C.A. Le Meur, E. 2010-07 text http://nora.nerc.ac.uk/id/eprint/10843/ https://nora.nerc.ac.uk/id/eprint/10843/1/grl27086.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010GL043334 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/10843/1/grl27086.pdf Gagliardini, O.; Durand, G.; Zwinger, T.; Hindmarsh, R.C.A. orcid:0000-0003-1633-2416 Le Meur, E. 2010 Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics. Geophysical Research Letters, 37 (14), L14501. 5, pp. https://doi.org/10.1029/2010GL043334 <https://doi.org/10.1029/2010GL043334> Meteorology and Climatology Glaciology Publication - Article PeerReviewed 2010 ftnerc https://doi.org/10.1029/2010GL043334 2023-02-04T19:26:58Z Increase in ice-shelf melting is generally presumed to have triggered recent coastal ice-sheet thinning. Using a full-Stokes finite element model which includes a proper description of the grounding line dynamics, we investigate the impact of melting below ice shelves. We argue that the influence of ice-shelf melting on the ice-sheet dynamics induces a complex response, and the first naive view that melting inevitably leads to loss of grounded ice is erroneous. We demonstrate that melting acts directly on the magnitude of the buttressing force by modifying both the area experiencing lateral resistance and the ice-shelf velocity, indicating that the decrease of back stress imposed by the ice-shelf is the prevailing cause of inland dynamical thinning. We further show that feedback from melting and buttressing forces can lead to nontrivial results, as an increase in the average melt rate may lead to inland ice thickening and grounding line advance. Citation: Gagliardini, O., G. Durand, T. Zwinger, R. C. A. Hindmarsh, and E. Le Meur (2010), Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics, Geophys. Res. Lett., 37, L14501, doi:10.1029/2010GL043334. Article in Journal/Newspaper Ice Sheet Ice Shelf Ice Shelves Natural Environment Research Council: NERC Open Research Archive Geophysical Research Letters 37 14 n/a n/a |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Meteorology and Climatology Glaciology |
spellingShingle |
Meteorology and Climatology Glaciology Gagliardini, O. Durand, G. Zwinger, T. Hindmarsh, R.C.A. Le Meur, E. Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
topic_facet |
Meteorology and Climatology Glaciology |
description |
Increase in ice-shelf melting is generally presumed to have triggered recent coastal ice-sheet thinning. Using a full-Stokes finite element model which includes a proper description of the grounding line dynamics, we investigate the impact of melting below ice shelves. We argue that the influence of ice-shelf melting on the ice-sheet dynamics induces a complex response, and the first naive view that melting inevitably leads to loss of grounded ice is erroneous. We demonstrate that melting acts directly on the magnitude of the buttressing force by modifying both the area experiencing lateral resistance and the ice-shelf velocity, indicating that the decrease of back stress imposed by the ice-shelf is the prevailing cause of inland dynamical thinning. We further show that feedback from melting and buttressing forces can lead to nontrivial results, as an increase in the average melt rate may lead to inland ice thickening and grounding line advance. Citation: Gagliardini, O., G. Durand, T. Zwinger, R. C. A. Hindmarsh, and E. Le Meur (2010), Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics, Geophys. Res. Lett., 37, L14501, doi:10.1029/2010GL043334. |
format |
Article in Journal/Newspaper |
author |
Gagliardini, O. Durand, G. Zwinger, T. Hindmarsh, R.C.A. Le Meur, E. |
author_facet |
Gagliardini, O. Durand, G. Zwinger, T. Hindmarsh, R.C.A. Le Meur, E. |
author_sort |
Gagliardini, O. |
title |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_short |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_full |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_fullStr |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_full_unstemmed |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_sort |
coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
publisher |
American Geophysical Union |
publishDate |
2010 |
url |
http://nora.nerc.ac.uk/id/eprint/10843/ https://nora.nerc.ac.uk/id/eprint/10843/1/grl27086.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010GL043334 |
genre |
Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Ice Sheet Ice Shelf Ice Shelves |
op_relation |
https://nora.nerc.ac.uk/id/eprint/10843/1/grl27086.pdf Gagliardini, O.; Durand, G.; Zwinger, T.; Hindmarsh, R.C.A. orcid:0000-0003-1633-2416 Le Meur, E. 2010 Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics. Geophysical Research Letters, 37 (14), L14501. 5, pp. https://doi.org/10.1029/2010GL043334 <https://doi.org/10.1029/2010GL043334> |
op_doi |
https://doi.org/10.1029/2010GL043334 |
container_title |
Geophysical Research Letters |
container_volume |
37 |
container_issue |
14 |
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n/a |
op_container_end_page |
n/a |
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1766030909926014976 |