Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing
Glacier-front dynamics is an important control on Greenland's ice mass balance. Warmer ocean waters trigger ice-front retreats of marine-terminating glaciers, and the corresponding loss in resistive stress leads to glacier acceleration and thinning. Here we present an approach to quantify the s...
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Online Access: | https://epic.awi.de/id/eprint/42234/ https://hdl.handle.net/10013/epic.48957 |
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ftawi:oai:epic.awi.de:42234 2024-09-15T18:07:39+00:00 Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing Morlighem, Mathieu Bondzio, Johannes Seroussi, Hélène Rignot, E. Larour, E. Humbert, Angelika Rebuffi, S.-A. 2016 https://epic.awi.de/id/eprint/42234/ https://hdl.handle.net/10013/epic.48957 unknown Wiley Morlighem, M. , Bondzio, J. , Seroussi, H. , Rignot, E. , Larour, E. , Humbert, A. and Rebuffi, S. A. (2016) Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing , Geophysical Research Letters, 43 (6), pp. 2659-2666 . doi:10.1002/2016GL067695 <https://doi.org/10.1002/2016GL067695> , hdl:10013/epic.48957 EPIC3Geophysical Research Letters, Wiley, 43(6), pp. 2659-2666, ISSN: 0094-8276 Article isiRev 2016 ftawi https://doi.org/10.1002/2016GL067695 2024-06-24T04:15:36Z Glacier-front dynamics is an important control on Greenland's ice mass balance. Warmer ocean waters trigger ice-front retreats of marine-terminating glaciers, and the corresponding loss in resistive stress leads to glacier acceleration and thinning. Here we present an approach to quantify the sensitivity and vulnerability of marine-terminating glaciers to ocean-induced melt. We develop a plan view model of Store Gletscher that includes a level set-based moving boundary capability, a parameterized ocean-induced melt, and a calving law with complete and precise land and fjord topographies to model the response of the glacier to increased melt. We find that the glacier is stabilized by a sill at its terminus. The glacier is dislodged from the sill when ocean-induced melt quadruples, at which point the glacier retreats irreversibly for 27 km into a reverse bed. The model suggests that ice-ocean interactions are the triggering mechanism of glacier retreat, but the bed controls its magnitude. Article in Journal/Newspaper glacier Greenland Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Geophysical Research Letters 43 6 2659 2666 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Glacier-front dynamics is an important control on Greenland's ice mass balance. Warmer ocean waters trigger ice-front retreats of marine-terminating glaciers, and the corresponding loss in resistive stress leads to glacier acceleration and thinning. Here we present an approach to quantify the sensitivity and vulnerability of marine-terminating glaciers to ocean-induced melt. We develop a plan view model of Store Gletscher that includes a level set-based moving boundary capability, a parameterized ocean-induced melt, and a calving law with complete and precise land and fjord topographies to model the response of the glacier to increased melt. We find that the glacier is stabilized by a sill at its terminus. The glacier is dislodged from the sill when ocean-induced melt quadruples, at which point the glacier retreats irreversibly for 27 km into a reverse bed. The model suggests that ice-ocean interactions are the triggering mechanism of glacier retreat, but the bed controls its magnitude. |
format |
Article in Journal/Newspaper |
author |
Morlighem, Mathieu Bondzio, Johannes Seroussi, Hélène Rignot, E. Larour, E. Humbert, Angelika Rebuffi, S.-A. |
spellingShingle |
Morlighem, Mathieu Bondzio, Johannes Seroussi, Hélène Rignot, E. Larour, E. Humbert, Angelika Rebuffi, S.-A. Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing |
author_facet |
Morlighem, Mathieu Bondzio, Johannes Seroussi, Hélène Rignot, E. Larour, E. Humbert, Angelika Rebuffi, S.-A. |
author_sort |
Morlighem, Mathieu |
title |
Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing |
title_short |
Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing |
title_full |
Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing |
title_fullStr |
Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing |
title_full_unstemmed |
Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing |
title_sort |
modeling of store gletscher’s calving dynamics, west greenland, in response to ocean thermal forcing |
publisher |
Wiley |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/42234/ https://hdl.handle.net/10013/epic.48957 |
genre |
glacier Greenland |
genre_facet |
glacier Greenland |
op_source |
EPIC3Geophysical Research Letters, Wiley, 43(6), pp. 2659-2666, ISSN: 0094-8276 |
op_relation |
Morlighem, M. , Bondzio, J. , Seroussi, H. , Rignot, E. , Larour, E. , Humbert, A. and Rebuffi, S. A. (2016) Modeling of Store Gletscher’s calving dynamics, West Greenland, in response to ocean thermal forcing , Geophysical Research Letters, 43 (6), pp. 2659-2666 . doi:10.1002/2016GL067695 <https://doi.org/10.1002/2016GL067695> , hdl:10013/epic.48957 |
op_doi |
https://doi.org/10.1002/2016GL067695 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
6 |
container_start_page |
2659 |
op_container_end_page |
2666 |
_version_ |
1810445036027904000 |