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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ftawi:oai:epic.awi.de:40233 2024-09-15T17:40:42+00:00 Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland Bondzio, Johannes H. Seroussi, Hélène Morlighem, Mathieu Kleiner, Thomas Rückamp, Martin Humbert, Angelika Larour, Eric Y. 2016-03-03 application/pdf https://epic.awi.de/id/eprint/40233/ https://epic.awi.de/id/eprint/40233/1/tc-10-497-2016.pdf https://doi.org/10.5194/tc-10-497-2016 https://hdl.handle.net/10013/epic.47373 https://hdl.handle.net/10013/epic.47373.d001 unknown European Geosciences Union https://epic.awi.de/id/eprint/40233/1/tc-10-497-2016.pdf https://hdl.handle.net/10013/epic.47373.d001 Bondzio, J. H. , Seroussi, H. , Morlighem, M. , Kleiner, T. orcid:0000-0001-7825-5765 , Rückamp, M. orcid:0000-0003-2512-7238 , Humbert, A. and Larour, E. Y. (2016) Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland , The Cryosphere, 10 (2), pp. 497-510 . doi:10.5194/tc-10-497-2016 <https://doi.org/10.5194/tc-10-497-2016> , hdl:10013/epic.47373 EPIC3The Cryosphere, European Geosciences Union, 10(2), pp. 497-510, ISSN: 1994-0424 Article isiRev 2016 ftawi https://doi.org/10.5194/tc-10-497-2016 2024-06-24T04:14:20Z 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) The Cryosphere 10 2 497 510 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 |
Bondzio, Johannes H. Seroussi, Hélène Morlighem, Mathieu Kleiner, Thomas Rückamp, Martin Humbert, Angelika Larour, Eric Y. |
spellingShingle |
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 |
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 |
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 |
European Geosciences Union |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/40233/ https://epic.awi.de/id/eprint/40233/1/tc-10-497-2016.pdf https://doi.org/10.5194/tc-10-497-2016 https://hdl.handle.net/10013/epic.47373 https://hdl.handle.net/10013/epic.47373.d001 |
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 |
EPIC3The Cryosphere, European Geosciences Union, 10(2), pp. 497-510, ISSN: 1994-0424 |
op_relation |
https://epic.awi.de/id/eprint/40233/1/tc-10-497-2016.pdf https://hdl.handle.net/10013/epic.47373.d001 Bondzio, J. H. , Seroussi, H. , Morlighem, M. , Kleiner, T. orcid:0000-0001-7825-5765 , Rückamp, M. orcid:0000-0003-2512-7238 , Humbert, A. and Larour, E. Y. (2016) Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland , The Cryosphere, 10 (2), pp. 497-510 . doi:10.5194/tc-10-497-2016 <https://doi.org/10.5194/tc-10-497-2016> , hdl:10013/epic.47373 |
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 |
_version_ |
1810486723030810624 |