Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland, links model results in MATLAB format
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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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.859143 2023-05-15T14:03:05+02:00 Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland, links model results in MATLAB format Bondzio, Johannes H Seroussi, Hélène Morlighem, Mathieu Kleiner, Thomas Rückamp, Martin Humbert, Angelika Larour, Eric Y LATITUDE: 69.121800 * LONGITUDE: -47.918200 2016-03-27 application/zip, 469.2 MBytes https://doi.pangaea.de/10.1594/PANGAEA.859143 https://doi.org/10.1594/PANGAEA.859143 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.859143 https://doi.org/10.1594/PANGAEA.859143 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Bondzio, Johannes H; Seroussi, Hélène; Morlighem, Mathieu; Kleiner, Thomas; Rückamp, Martin; Humbert, Angelika; Larour, Eric Y (2016): Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland. The Cryosphere, 10(2), 497-510, https://doi.org/10.5194/tc-10-497-2016 Jakobshavn_Isbræ_drainage_basin West Greenland Dataset 2016 ftpangaea https://doi.org/10.1594/PANGAEA.859143 https://doi.org/10.5194/tc-10-497-2016 2023-01-20T09:07:02Z 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. Dataset Antarc* Antarctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ The Cryosphere PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) ENVELOPE(-47.918200,-47.918200,69.121800,69.121800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Jakobshavn_Isbræ_drainage_basin West Greenland |
spellingShingle |
Jakobshavn_Isbræ_drainage_basin West Greenland Bondzio, Johannes H Seroussi, Hélène Morlighem, Mathieu Kleiner, Thomas Rückamp, Martin Humbert, Angelika Larour, Eric Y Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland, links model results in MATLAB format |
topic_facet |
Jakobshavn_Isbræ_drainage_basin West Greenland |
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 |
Dataset |
author |
Bondzio, Johannes H Seroussi, Hélène Morlighem, Mathieu Kleiner, Thomas Rückamp, Martin Humbert, Angelika Larour, Eric Y |
author_facet |
Bondzio, Johannes H Seroussi, Hélène Morlighem, Mathieu Kleiner, Thomas Rückamp, Martin Humbert, Angelika Larour, Eric Y |
author_sort |
Bondzio, Johannes H |
title |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland, links model results in MATLAB format |
title_short |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland, links model results in MATLAB format |
title_full |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland, links model results in MATLAB format |
title_fullStr |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland, links model results in MATLAB format |
title_full_unstemmed |
Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland, links model results in MATLAB format |
title_sort |
modelling calving front dynamics using a level-set method: application to jakobshavn isbræ, west greenland, links model results in matlab format |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.859143 https://doi.org/10.1594/PANGAEA.859143 |
op_coverage |
LATITUDE: 69.121800 * LONGITUDE: -47.918200 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) ENVELOPE(-47.918200,-47.918200,69.121800,69.121800) |
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 |
Supplement to: Bondzio, Johannes H; Seroussi, Hélène; Morlighem, Mathieu; Kleiner, Thomas; Rückamp, Martin; Humbert, Angelika; Larour, Eric Y (2016): Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland. The Cryosphere, 10(2), 497-510, https://doi.org/10.5194/tc-10-497-2016 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.859143 https://doi.org/10.1594/PANGAEA.859143 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.859143 https://doi.org/10.5194/tc-10-497-2016 |
_version_ |
1766273611141742592 |