Modelling dynamic ice-sheet boundaries and grounding line migration using the level set method
Abstract Computing predictions of future sea level that include well-defined uncertainty bounds requires models that are capable of robustly simulating the evolution of ice sheets and glaciers. Ice flow behaviour is known to be sensitive to the location and geometry of dynamic ice boundaries such as...
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/jog.2020.45 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143020000453 |
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crcambridgeupr:10.1017/jog.2020.45 2024-03-03T08:45:24+00:00 Modelling dynamic ice-sheet boundaries and grounding line migration using the level set method Hossain, M. Alamgir Pimentel, Sam Stockie, John M. 2020 http://dx.doi.org/10.1017/jog.2020.45 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143020000453 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 66, issue 259, page 766-776 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2020 crcambridgeupr https://doi.org/10.1017/jog.2020.45 2024-02-08T08:37:24Z Abstract Computing predictions of future sea level that include well-defined uncertainty bounds requires models that are capable of robustly simulating the evolution of ice sheets and glaciers. Ice flow behaviour is known to be sensitive to the location and geometry of dynamic ice boundaries such as the grounding line (GRL), terminus position and ice surface elevation, so that any such model should track these interfaces with a high degree of accuracy. To address this challenge, we implement a numerical approach that uses the level-set method (LSM) that accurately models the evolution of the ice–air and ice–water interface as well as capturing topological changes in ice-sheet geometry. This approach is evaluated by comparing simulations of grounded and marine-terminating ice sheets to various analytical and numerical benchmark solutions. A particular advantage of the LSM is its ability to explicitly track the moving margin and GRL while using a fixed grid finite-difference scheme. Our results demonstrate that the LSM is an accurate and robust approach for tracking the ice surface interface and terminus for advancing and retreating ice sheets, including the transient marine ice-sheet interface and GRL positions. Article in Journal/Newspaper Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 66 259 766 776 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Hossain, M. Alamgir Pimentel, Sam Stockie, John M. Modelling dynamic ice-sheet boundaries and grounding line migration using the level set method |
topic_facet |
Earth-Surface Processes |
description |
Abstract Computing predictions of future sea level that include well-defined uncertainty bounds requires models that are capable of robustly simulating the evolution of ice sheets and glaciers. Ice flow behaviour is known to be sensitive to the location and geometry of dynamic ice boundaries such as the grounding line (GRL), terminus position and ice surface elevation, so that any such model should track these interfaces with a high degree of accuracy. To address this challenge, we implement a numerical approach that uses the level-set method (LSM) that accurately models the evolution of the ice–air and ice–water interface as well as capturing topological changes in ice-sheet geometry. This approach is evaluated by comparing simulations of grounded and marine-terminating ice sheets to various analytical and numerical benchmark solutions. A particular advantage of the LSM is its ability to explicitly track the moving margin and GRL while using a fixed grid finite-difference scheme. Our results demonstrate that the LSM is an accurate and robust approach for tracking the ice surface interface and terminus for advancing and retreating ice sheets, including the transient marine ice-sheet interface and GRL positions. |
format |
Article in Journal/Newspaper |
author |
Hossain, M. Alamgir Pimentel, Sam Stockie, John M. |
author_facet |
Hossain, M. Alamgir Pimentel, Sam Stockie, John M. |
author_sort |
Hossain, M. Alamgir |
title |
Modelling dynamic ice-sheet boundaries and grounding line migration using the level set method |
title_short |
Modelling dynamic ice-sheet boundaries and grounding line migration using the level set method |
title_full |
Modelling dynamic ice-sheet boundaries and grounding line migration using the level set method |
title_fullStr |
Modelling dynamic ice-sheet boundaries and grounding line migration using the level set method |
title_full_unstemmed |
Modelling dynamic ice-sheet boundaries and grounding line migration using the level set method |
title_sort |
modelling dynamic ice-sheet boundaries and grounding line migration using the level set method |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/jog.2020.45 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143020000453 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 66, issue 259, page 766-776 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2020.45 |
container_title |
Journal of Glaciology |
container_volume |
66 |
container_issue |
259 |
container_start_page |
766 |
op_container_end_page |
776 |
_version_ |
1792500955708653568 |