Enthalpy benchmark experiments for numerical ice sheet models
We present benchmark experiments to test the implementation of enthalpy and the corresponding boundary conditions in numerical ice sheet models. Since we impose several assumptions on the experiment design, analytical solutions can be formulated for the proposed numerical experiments. The first expe...
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Language: | English |
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Copernicus Publications
2015
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fttriple:oai:gotriple.eu:oai:doaj.org/article:90baaa8bac714c8fb400184bf358de5e 2023-05-15T16:40:25+02:00 Enthalpy benchmark experiments for numerical ice sheet models T. Kleiner M. Rückamp J. H. Bondzio A. Humbert 2015-02-01 https://doi.org/10.5194/tc-9-217-2015 http://www.the-cryosphere.net/9/217/2015/tc-9-217-2015.pdf https://doaj.org/article/90baaa8bac714c8fb400184bf358de5e en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-9-217-2015 http://www.the-cryosphere.net/9/217/2015/tc-9-217-2015.pdf https://doaj.org/article/90baaa8bac714c8fb400184bf358de5e undefined The Cryosphere, Vol 9, Iss 1, Pp 217-228 (2015) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.5194/tc-9-217-2015 2023-01-22T17:50:33Z We present benchmark experiments to test the implementation of enthalpy and the corresponding boundary conditions in numerical ice sheet models. Since we impose several assumptions on the experiment design, analytical solutions can be formulated for the proposed numerical experiments. The first experiment tests the functionality of the boundary condition scheme and the basal melt rate calculation during transient simulations. The second experiment addresses the steady-state enthalpy profile and the resulting position of the cold–temperate transition surface (CTS). For both experiments we assume ice flow in a parallel-sided slab decoupled from the thermal regime. We compare simulation results achieved by three different ice flow-models with these analytical solutions. The models agree well to the analytical solutions, if the change in conductivity between cold and temperate ice is properly considered in the model. In particular, the enthalpy gradient on the cold side of the CTS goes to zero in the limit of vanishing temperate-ice conductivity, as required from the physical jump conditions at the CTS. Article in Journal/Newspaper Ice Sheet The Cryosphere Unknown The Cryosphere 9 1 217 228 |
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geo envir |
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geo envir T. Kleiner M. Rückamp J. H. Bondzio A. Humbert Enthalpy benchmark experiments for numerical ice sheet models |
topic_facet |
geo envir |
description |
We present benchmark experiments to test the implementation of enthalpy and the corresponding boundary conditions in numerical ice sheet models. Since we impose several assumptions on the experiment design, analytical solutions can be formulated for the proposed numerical experiments. The first experiment tests the functionality of the boundary condition scheme and the basal melt rate calculation during transient simulations. The second experiment addresses the steady-state enthalpy profile and the resulting position of the cold–temperate transition surface (CTS). For both experiments we assume ice flow in a parallel-sided slab decoupled from the thermal regime. We compare simulation results achieved by three different ice flow-models with these analytical solutions. The models agree well to the analytical solutions, if the change in conductivity between cold and temperate ice is properly considered in the model. In particular, the enthalpy gradient on the cold side of the CTS goes to zero in the limit of vanishing temperate-ice conductivity, as required from the physical jump conditions at the CTS. |
format |
Article in Journal/Newspaper |
author |
T. Kleiner M. Rückamp J. H. Bondzio A. Humbert |
author_facet |
T. Kleiner M. Rückamp J. H. Bondzio A. Humbert |
author_sort |
T. Kleiner |
title |
Enthalpy benchmark experiments for numerical ice sheet models |
title_short |
Enthalpy benchmark experiments for numerical ice sheet models |
title_full |
Enthalpy benchmark experiments for numerical ice sheet models |
title_fullStr |
Enthalpy benchmark experiments for numerical ice sheet models |
title_full_unstemmed |
Enthalpy benchmark experiments for numerical ice sheet models |
title_sort |
enthalpy benchmark experiments for numerical ice sheet models |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-217-2015 http://www.the-cryosphere.net/9/217/2015/tc-9-217-2015.pdf https://doaj.org/article/90baaa8bac714c8fb400184bf358de5e |
genre |
Ice Sheet The Cryosphere |
genre_facet |
Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 9, Iss 1, Pp 217-228 (2015) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-9-217-2015 http://www.the-cryosphere.net/9/217/2015/tc-9-217-2015.pdf https://doaj.org/article/90baaa8bac714c8fb400184bf358de5e |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-9-217-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
1 |
container_start_page |
217 |
op_container_end_page |
228 |
_version_ |
1766030808583241728 |