A moving-point approach to model shallow ice sheets: a study case with radially symmetrical ice sheets
Predicting the evolution of ice sheets requires numerical models able to accurately track the migration of ice sheet continental margins or grounding lines. We introduce a physically based moving-point approach for the flow of ice sheets based on the conservation of local masses. This allows the ice...
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Online Access: | https://doi.org/10.5194/tc-10-1-2016 https://tc.copernicus.org/articles/10/1/2016/ |
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ftcopernicus:oai:publications.copernicus.org:tc31267 2023-05-15T16:40:03+02:00 A moving-point approach to model shallow ice sheets: a study case with radially symmetrical ice sheets Bonan, B. Baines, M. J. Nichols, N. K. Partridge, D. 2018-09-27 application/pdf https://doi.org/10.5194/tc-10-1-2016 https://tc.copernicus.org/articles/10/1/2016/ eng eng doi:10.5194/tc-10-1-2016 https://tc.copernicus.org/articles/10/1/2016/ eISSN: 1994-0424 Text 2018 ftcopernicus https://doi.org/10.5194/tc-10-1-2016 2020-07-20T16:24:19Z Predicting the evolution of ice sheets requires numerical models able to accurately track the migration of ice sheet continental margins or grounding lines. We introduce a physically based moving-point approach for the flow of ice sheets based on the conservation of local masses. This allows the ice sheet margins to be tracked explicitly. Our approach is also well suited to capture waiting-time behaviour efficiently. A finite-difference moving-point scheme is derived and applied in a simplified context (continental radially symmetrical shallow ice approximation). The scheme, which is inexpensive, is verified by comparing the results with steady states obtained from an analytic solution and with exact moving-margin transient solutions. In both cases the scheme is able to track the position of the ice sheet margin with high accuracy. Text Ice Sheet Copernicus Publications: E-Journals The Cryosphere 10 1 1 14 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Predicting the evolution of ice sheets requires numerical models able to accurately track the migration of ice sheet continental margins or grounding lines. We introduce a physically based moving-point approach for the flow of ice sheets based on the conservation of local masses. This allows the ice sheet margins to be tracked explicitly. Our approach is also well suited to capture waiting-time behaviour efficiently. A finite-difference moving-point scheme is derived and applied in a simplified context (continental radially symmetrical shallow ice approximation). The scheme, which is inexpensive, is verified by comparing the results with steady states obtained from an analytic solution and with exact moving-margin transient solutions. In both cases the scheme is able to track the position of the ice sheet margin with high accuracy. |
format |
Text |
author |
Bonan, B. Baines, M. J. Nichols, N. K. Partridge, D. |
spellingShingle |
Bonan, B. Baines, M. J. Nichols, N. K. Partridge, D. A moving-point approach to model shallow ice sheets: a study case with radially symmetrical ice sheets |
author_facet |
Bonan, B. Baines, M. J. Nichols, N. K. Partridge, D. |
author_sort |
Bonan, B. |
title |
A moving-point approach to model shallow ice sheets: a study case with radially symmetrical ice sheets |
title_short |
A moving-point approach to model shallow ice sheets: a study case with radially symmetrical ice sheets |
title_full |
A moving-point approach to model shallow ice sheets: a study case with radially symmetrical ice sheets |
title_fullStr |
A moving-point approach to model shallow ice sheets: a study case with radially symmetrical ice sheets |
title_full_unstemmed |
A moving-point approach to model shallow ice sheets: a study case with radially symmetrical ice sheets |
title_sort |
moving-point approach to model shallow ice sheets: a study case with radially symmetrical ice sheets |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-10-1-2016 https://tc.copernicus.org/articles/10/1/2016/ |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-10-1-2016 https://tc.copernicus.org/articles/10/1/2016/ |
op_doi |
https://doi.org/10.5194/tc-10-1-2016 |
container_title |
The Cryosphere |
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10 |
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1 |
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1 |
op_container_end_page |
14 |
_version_ |
1766030415220441088 |