Parameterization of subgrid-scale processes in finite element sea ice - ocean models
With the continuous improvement of models for better climate studies and predictions, simulating small scale physical processes remain a challenge. From this perspective, subgrid-scale parameterizations are used whenever such processes cannot be explicitly represented and when their inclusion is ben...
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:165095 2024-05-12T08:10:51+00:00 Parameterization of subgrid-scale processes in finite element sea ice - ocean models Pestiaux, Alice UCL - SST/ELI/ELIC - Earth & Climate UCL - Faculté des Sciences Fichefet, Thierry Deleersnijder, Eric De Keersmaecker, Marie-Laurence Goosse, Hugues Legat, Vincent Danilov, Sergey Vancoppenolle, Martin 2015 http://hdl.handle.net/2078.1/165095 eng eng boreal:165095 http://hdl.handle.net/2078.1/165095 info:eu-repo/semantics/openAccess info:eu-repo/semantics/doctoralThesis 2015 ftunistlouisbrus 2024-04-18T17:47:08Z With the continuous improvement of models for better climate studies and predictions, simulating small scale physical processes remain a challenge. From this perspective, subgrid-scale parameterizations are used whenever such processes cannot be explicitly represented and when their inclusion is beneficial to simulations. However, the parameterizations result from approximations of the reality and also present drawbacks in specific circumstances. In order to prevent these parameterizations from shifting to unphysical behaviours, numerical artefacts are frequently used. In models based on the finite element method, these artefacts are distinctive due to the specificity of the formalism itself. The goal of this doctoral thesis is first to find the best compromise between these numerical artefacts and the preservation of physical processes, through the study of subgrid-scale oceanic parameterizations in a model based on the finite element method. Second, a coupled sea ice – ocean model is built from two disctinct models in order to take advantages of each of them, i.e., unstructured meshes and sophisticated representation of sea ice physics. Through this thesis, these different models are successively used in configurations of increasing complexity, in order to understand the impacts of parameterizations on the models physics accuracy and their skills with respect to observations. (SC - Sciences) -- UCL, 2015 Doctoral or Postdoctoral Thesis Sea ice DIAL@USL-B (Université Saint-Louis, Bruxelles) |
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Open Polar |
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DIAL@USL-B (Université Saint-Louis, Bruxelles) |
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ftunistlouisbrus |
language |
English |
description |
With the continuous improvement of models for better climate studies and predictions, simulating small scale physical processes remain a challenge. From this perspective, subgrid-scale parameterizations are used whenever such processes cannot be explicitly represented and when their inclusion is beneficial to simulations. However, the parameterizations result from approximations of the reality and also present drawbacks in specific circumstances. In order to prevent these parameterizations from shifting to unphysical behaviours, numerical artefacts are frequently used. In models based on the finite element method, these artefacts are distinctive due to the specificity of the formalism itself. The goal of this doctoral thesis is first to find the best compromise between these numerical artefacts and the preservation of physical processes, through the study of subgrid-scale oceanic parameterizations in a model based on the finite element method. Second, a coupled sea ice – ocean model is built from two disctinct models in order to take advantages of each of them, i.e., unstructured meshes and sophisticated representation of sea ice physics. Through this thesis, these different models are successively used in configurations of increasing complexity, in order to understand the impacts of parameterizations on the models physics accuracy and their skills with respect to observations. (SC - Sciences) -- UCL, 2015 |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate UCL - Faculté des Sciences Fichefet, Thierry Deleersnijder, Eric De Keersmaecker, Marie-Laurence Goosse, Hugues Legat, Vincent Danilov, Sergey Vancoppenolle, Martin |
format |
Doctoral or Postdoctoral Thesis |
author |
Pestiaux, Alice |
spellingShingle |
Pestiaux, Alice Parameterization of subgrid-scale processes in finite element sea ice - ocean models |
author_facet |
Pestiaux, Alice |
author_sort |
Pestiaux, Alice |
title |
Parameterization of subgrid-scale processes in finite element sea ice - ocean models |
title_short |
Parameterization of subgrid-scale processes in finite element sea ice - ocean models |
title_full |
Parameterization of subgrid-scale processes in finite element sea ice - ocean models |
title_fullStr |
Parameterization of subgrid-scale processes in finite element sea ice - ocean models |
title_full_unstemmed |
Parameterization of subgrid-scale processes in finite element sea ice - ocean models |
title_sort |
parameterization of subgrid-scale processes in finite element sea ice - ocean models |
publishDate |
2015 |
url |
http://hdl.handle.net/2078.1/165095 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
boreal:165095 http://hdl.handle.net/2078.1/165095 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1798854386439421952 |