Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland
Calving is a major mechanism of ice discharge of the Antarctic and Greenland ice sheets, and a change in calving front position affects the entire stress regime of marine terminating glaciers. The representation of calving front dynamics in a 2-D or 3-D ice sheet model remains non-trivial. Here, we...
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ftdoajarticles:oai:doaj.org/article:e1e8ca5519b04cd3aeddd694724b66a2 2023-05-15T14:04:38+02:00 Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland J. H. Bondzio H. Seroussi M. Morlighem T. Kleiner M. Rückamp A. Humbert E. Y. Larour 2016-03-01T00:00:00Z https://doi.org/10.5194/tc-10-497-2016 https://doaj.org/article/e1e8ca5519b04cd3aeddd694724b66a2 EN eng Copernicus Publications http://www.the-cryosphere.net/10/497/2016/tc-10-497-2016.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-10-497-2016 https://doaj.org/article/e1e8ca5519b04cd3aeddd694724b66a2 The Cryosphere, Vol 10, Iss 2, Pp 497-510 (2016) Environmental sciences GE1-350 Geology QE1-996.5 article 2016 ftdoajarticles https://doi.org/10.5194/tc-10-497-2016 2022-12-30T21:46:27Z Calving is a major mechanism of ice discharge of the Antarctic and Greenland ice sheets, and a change in calving front position affects the entire stress regime of marine terminating glaciers. The representation of calving front dynamics in a 2-D or 3-D ice sheet model remains non-trivial. Here, we present the theoretical and technical framework for a level-set method, an implicit boundary tracking scheme, which we implement into the Ice Sheet System Model (ISSM). This scheme allows us to study the dynamic response of a drainage basin to user-defined calving rates. We apply the method to Jakobshavn Isbræ, a major marine terminating outlet glacier of the West Greenland Ice Sheet. The model robustly reproduces the high sensitivity of the glacier to calving, and we find that enhanced calving triggers significant acceleration of the ice stream. Upstream acceleration is sustained through a combination of mechanisms. However, both lateral stress and ice influx stabilize the ice stream. This study provides new insights into the ongoing changes occurring at Jakobshavn Isbræ and emphasizes that the incorporation of moving boundaries and dynamic lateral effects, not captured in flow-line models, is key for realistic model projections of sea level rise on centennial timescales. Article in Journal/Newspaper Antarc* Antarctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ The Cryosphere Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) The Cryosphere 10 2 497 510 |
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 J. H. Bondzio H. Seroussi M. Morlighem T. Kleiner M. Rückamp A. Humbert E. Y. Larour Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Calving is a major mechanism of ice discharge of the Antarctic and Greenland ice sheets, and a change in calving front position affects the entire stress regime of marine terminating glaciers. The representation of calving front dynamics in a 2-D or 3-D ice sheet model remains non-trivial. Here, we present the theoretical and technical framework for a level-set method, an implicit boundary tracking scheme, which we implement into the Ice Sheet System Model (ISSM). This scheme allows us to study the dynamic response of a drainage basin to user-defined calving rates. We apply the method to Jakobshavn Isbræ, a major marine terminating outlet glacier of the West Greenland Ice Sheet. The model robustly reproduces the high sensitivity of the glacier to calving, and we find that enhanced calving triggers significant acceleration of the ice stream. Upstream acceleration is sustained through a combination of mechanisms. However, both lateral stress and ice influx stabilize the ice stream. This study provides new insights into the ongoing changes occurring at Jakobshavn Isbræ and emphasizes that the incorporation of moving boundaries and dynamic lateral effects, not captured in flow-line models, is key for realistic model projections of sea level rise on centennial timescales. |
format |
Article in Journal/Newspaper |
author |
J. H. Bondzio H. Seroussi M. Morlighem T. Kleiner M. Rückamp A. Humbert E. Y. Larour |
author_facet |
J. H. Bondzio H. Seroussi M. Morlighem T. Kleiner M. Rückamp A. Humbert E. Y. Larour |
author_sort |
J. H. Bondzio |
title |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland |
title_short |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland |
title_full |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland |
title_fullStr |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland |
title_full_unstemmed |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland |
title_sort |
modelling calving front dynamics using a level-set method: application to jakobshavn isbræ, west greenland |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/tc-10-497-2016 https://doaj.org/article/e1e8ca5519b04cd3aeddd694724b66a2 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Antarctic The Antarctic Greenland Jakobshavn Isbræ |
geographic_facet |
Antarctic The Antarctic Greenland Jakobshavn Isbræ |
genre |
Antarc* Antarctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ The Cryosphere |
genre_facet |
Antarc* Antarctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ The Cryosphere |
op_source |
The Cryosphere, Vol 10, Iss 2, Pp 497-510 (2016) |
op_relation |
http://www.the-cryosphere.net/10/497/2016/tc-10-497-2016.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-10-497-2016 https://doaj.org/article/e1e8ca5519b04cd3aeddd694724b66a2 |
op_doi |
https://doi.org/10.5194/tc-10-497-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
2 |
container_start_page |
497 |
op_container_end_page |
510 |
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1766275839917293568 |