A stabilized finite element method for calculating balance velocities in ice sheets
We present a numerical method for calculating vertically averaged velocity fields using a mass conservation approach, commonly known as balance velocities. This allows for an unstructured grid, is not dependent on a heuristic flow routing algorithm, and is both parallelizable and efficient. We apply...
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ftunivmontana:oai:scholarworks.umt.edu:cs_pubs-1029 2023-07-16T03:58:45+02:00 A stabilized finite element method for calculating balance velocities in ice sheets Brinkerhoff, Douglas Johnson, Jesse 2015-05-04T07:00:00Z application/pdf https://scholarworks.umt.edu/cs_pubs/29 https://doi.org/10.5194/gmd-8-1275-2015 https://scholarworks.umt.edu/context/cs_pubs/article/1029/viewcontent/A.pdf unknown ScholarWorks at University of Montana https://scholarworks.umt.edu/cs_pubs/29 doi:10.5194/gmd-8-1275-2015 https://scholarworks.umt.edu/context/cs_pubs/article/1029/viewcontent/A.pdf © Author(s) 2015 http://creativecommons.org/licenses/by/3.0/ Computer Science Faculty Publications Computer Sciences text 2015 ftunivmontana https://doi.org/10.5194/gmd-8-1275-2015 2023-06-27T22:10:57Z We present a numerical method for calculating vertically averaged velocity fields using a mass conservation approach, commonly known as balance velocities. This allows for an unstructured grid, is not dependent on a heuristic flow routing algorithm, and is both parallelizable and efficient. We apply the method to calculate depth-averaged velocities of the Greenland Ice Sheet, and find that the method produces grid-independent velocity fields for a sufficient parameterization of horizontal plane stresses on flow directions. We show that balance velocity can be used as the forward model for a constrained optimization problem that can be used to fill gaps and smooth strong gradients in InSAR velocity fields. Text Greenland Ice Sheet University of Montana: ScholarWorks Greenland Geoscientific Model Development 8 5 1275 1283 |
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University of Montana: ScholarWorks |
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ftunivmontana |
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topic |
Computer Sciences |
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Computer Sciences Brinkerhoff, Douglas Johnson, Jesse A stabilized finite element method for calculating balance velocities in ice sheets |
topic_facet |
Computer Sciences |
description |
We present a numerical method for calculating vertically averaged velocity fields using a mass conservation approach, commonly known as balance velocities. This allows for an unstructured grid, is not dependent on a heuristic flow routing algorithm, and is both parallelizable and efficient. We apply the method to calculate depth-averaged velocities of the Greenland Ice Sheet, and find that the method produces grid-independent velocity fields for a sufficient parameterization of horizontal plane stresses on flow directions. We show that balance velocity can be used as the forward model for a constrained optimization problem that can be used to fill gaps and smooth strong gradients in InSAR velocity fields. |
format |
Text |
author |
Brinkerhoff, Douglas Johnson, Jesse |
author_facet |
Brinkerhoff, Douglas Johnson, Jesse |
author_sort |
Brinkerhoff, Douglas |
title |
A stabilized finite element method for calculating balance velocities in ice sheets |
title_short |
A stabilized finite element method for calculating balance velocities in ice sheets |
title_full |
A stabilized finite element method for calculating balance velocities in ice sheets |
title_fullStr |
A stabilized finite element method for calculating balance velocities in ice sheets |
title_full_unstemmed |
A stabilized finite element method for calculating balance velocities in ice sheets |
title_sort |
stabilized finite element method for calculating balance velocities in ice sheets |
publisher |
ScholarWorks at University of Montana |
publishDate |
2015 |
url |
https://scholarworks.umt.edu/cs_pubs/29 https://doi.org/10.5194/gmd-8-1275-2015 https://scholarworks.umt.edu/context/cs_pubs/article/1029/viewcontent/A.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Computer Science Faculty Publications |
op_relation |
https://scholarworks.umt.edu/cs_pubs/29 doi:10.5194/gmd-8-1275-2015 https://scholarworks.umt.edu/context/cs_pubs/article/1029/viewcontent/A.pdf |
op_rights |
© Author(s) 2015 http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.5194/gmd-8-1275-2015 |
container_title |
Geoscientific Model Development |
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8 |
container_issue |
5 |
container_start_page |
1275 |
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1283 |
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1771546037671952384 |