Data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model VarGlaS
We introduce a novel, higher order, finite element ice sheet model called VarGlaS (Variational Glacier Simulator), which is built on the finite element framework FEniCS. Contrary to standard procedure in ice sheet modelling, VarGlaS formulates ice sheet motion as the minimization of an energy functi...
Published in: | The Cryosphere |
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Copernicus Publications
2013
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00022169 2023-05-15T16:21:23+02:00 Data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model VarGlaS Brinkerhoff, D. J. Johnson, J. V. 2013-07 electronic https://doi.org/10.5194/tc-7-1161-2013 https://noa.gwlb.de/receive/cop_mods_00022169 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022124/tc-7-1161-2013.pdf https://tc.copernicus.org/articles/7/1161/2013/tc-7-1161-2013.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-1161-2013 https://noa.gwlb.de/receive/cop_mods_00022169 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022124/tc-7-1161-2013.pdf https://tc.copernicus.org/articles/7/1161/2013/tc-7-1161-2013.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2013 ftnonlinearchiv https://doi.org/10.5194/tc-7-1161-2013 2022-02-08T22:51:17Z We introduce a novel, higher order, finite element ice sheet model called VarGlaS (Variational Glacier Simulator), which is built on the finite element framework FEniCS. Contrary to standard procedure in ice sheet modelling, VarGlaS formulates ice sheet motion as the minimization of an energy functional, conferring advantages such as a consistent platform for making numerical approximations, a coherent relationship between motion and heat generation, and implicit boundary treatment. VarGlaS also solves the equations of enthalpy rather than temperature, avoiding the solution of a contact problem. Rather than include a lengthy model spin-up procedure, VarGlaS possesses an automated framework for model inversion. These capabilities are brought to bear on several benchmark problems in ice sheet modelling, as well as a 500 yr simulation of the Greenland ice sheet at high resolution. VarGlaS performs well in benchmarking experiments and, given a constant climate and a 100 yr relaxation period, predicts a mass evolution of the Greenland ice sheet that matches present-day observations of mass loss. VarGlaS predicts a thinning in the interior and thickening of the margins of the ice sheet. Article in Journal/Newspaper glacier Greenland Ice Sheet The Cryosphere Niedersächsisches Online-Archiv NOA Greenland The Cryosphere 7 4 1161 1184 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Brinkerhoff, D. J. Johnson, J. V. Data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model VarGlaS |
topic_facet |
article Verlagsveröffentlichung |
description |
We introduce a novel, higher order, finite element ice sheet model called VarGlaS (Variational Glacier Simulator), which is built on the finite element framework FEniCS. Contrary to standard procedure in ice sheet modelling, VarGlaS formulates ice sheet motion as the minimization of an energy functional, conferring advantages such as a consistent platform for making numerical approximations, a coherent relationship between motion and heat generation, and implicit boundary treatment. VarGlaS also solves the equations of enthalpy rather than temperature, avoiding the solution of a contact problem. Rather than include a lengthy model spin-up procedure, VarGlaS possesses an automated framework for model inversion. These capabilities are brought to bear on several benchmark problems in ice sheet modelling, as well as a 500 yr simulation of the Greenland ice sheet at high resolution. VarGlaS performs well in benchmarking experiments and, given a constant climate and a 100 yr relaxation period, predicts a mass evolution of the Greenland ice sheet that matches present-day observations of mass loss. VarGlaS predicts a thinning in the interior and thickening of the margins of the ice sheet. |
format |
Article in Journal/Newspaper |
author |
Brinkerhoff, D. J. Johnson, J. V. |
author_facet |
Brinkerhoff, D. J. Johnson, J. V. |
author_sort |
Brinkerhoff, D. J. |
title |
Data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model VarGlaS |
title_short |
Data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model VarGlaS |
title_full |
Data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model VarGlaS |
title_fullStr |
Data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model VarGlaS |
title_full_unstemmed |
Data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model VarGlaS |
title_sort |
data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model varglas |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-1161-2013 https://noa.gwlb.de/receive/cop_mods_00022169 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022124/tc-7-1161-2013.pdf https://tc.copernicus.org/articles/7/1161/2013/tc-7-1161-2013.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet The Cryosphere |
genre_facet |
glacier Greenland Ice Sheet The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-1161-2013 https://noa.gwlb.de/receive/cop_mods_00022169 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022124/tc-7-1161-2013.pdf https://tc.copernicus.org/articles/7/1161/2013/tc-7-1161-2013.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-7-1161-2013 |
container_title |
The Cryosphere |
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7 |
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4 |
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1161 |
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1184 |
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