Iterative improvement of the shallow-ice approximation
We present a new algorithm for a fast iterative improvement of the shallow-ice approximation (SIA) for the modeling of glacier flow. Based on the traditional SIA scaling assumptions, the solution of the Stokes problem is found by an operator-splitting iterative technique. The SIA solution obtained i...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2008
|
Subjects: | |
Online Access: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_237995 |
id |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_237995 |
---|---|
record_format |
openpolar |
spelling |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_237995 2023-05-15T16:57:25+02:00 Iterative improvement of the shallow-ice approximation Soucek, O. Martinec, Z. 1.3 Earth System Modelling, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum 2008 https://gfzpublic.gfz-potsdam.de/pubman/item/item_237995 unknown info:eu-repo/semantics/altIdentifier/doi/10.3189/002214308787779924 https://gfzpublic.gfz-potsdam.de/pubman/item/item_237995 Journal of Glaciology 550 - Earth sciences info:eu-repo/semantics/article 2008 ftgfzpotsdam https://doi.org/10.3189/002214308787779924 2022-09-14T05:56:58Z We present a new algorithm for a fast iterative improvement of the shallow-ice approximation (SIA) for the modeling of glacier flow. Based on the traditional SIA scaling assumptions, the solution of the Stokes problem is found by an operator-splitting iterative technique. The SIA solution obtained in the first step is successively improved to obtain a higher-order pproximation. Each iterative step has computational demands comparable to solving the SIA, which makes the algorithm substantially faster than other higher-order or full-Stokes solvers. The performance of the algorithm is tested on a model example taken from the ISMIP-HOM intercomparison project. Article in Journal/Newspaper Journal of Glaciology GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Journal of Glaciology 54 188 812 822 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
topic |
550 - Earth sciences |
spellingShingle |
550 - Earth sciences Soucek, O. Martinec, Z. Iterative improvement of the shallow-ice approximation |
topic_facet |
550 - Earth sciences |
description |
We present a new algorithm for a fast iterative improvement of the shallow-ice approximation (SIA) for the modeling of glacier flow. Based on the traditional SIA scaling assumptions, the solution of the Stokes problem is found by an operator-splitting iterative technique. The SIA solution obtained in the first step is successively improved to obtain a higher-order pproximation. Each iterative step has computational demands comparable to solving the SIA, which makes the algorithm substantially faster than other higher-order or full-Stokes solvers. The performance of the algorithm is tested on a model example taken from the ISMIP-HOM intercomparison project. |
author2 |
1.3 Earth System Modelling, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum |
format |
Article in Journal/Newspaper |
author |
Soucek, O. Martinec, Z. |
author_facet |
Soucek, O. Martinec, Z. |
author_sort |
Soucek, O. |
title |
Iterative improvement of the shallow-ice approximation |
title_short |
Iterative improvement of the shallow-ice approximation |
title_full |
Iterative improvement of the shallow-ice approximation |
title_fullStr |
Iterative improvement of the shallow-ice approximation |
title_full_unstemmed |
Iterative improvement of the shallow-ice approximation |
title_sort |
iterative improvement of the shallow-ice approximation |
publishDate |
2008 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_237995 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/002214308787779924 https://gfzpublic.gfz-potsdam.de/pubman/item/item_237995 |
op_doi |
https://doi.org/10.3189/002214308787779924 |
container_title |
Journal of Glaciology |
container_volume |
54 |
container_issue |
188 |
container_start_page |
812 |
op_container_end_page |
822 |
_version_ |
1766048958375788544 |