CD-type discretization for sea ice dynamics in FESOM version 2
Two recently proposed variants of CD-type discretizations of sea ice dynamics on triangular meshes are implemented in the Finite-VolumE Sea ice–Ocean Model (FESOM version 2). The implementations use the finite element method in spherical geometry with longitude–latitude coordinates. Both are based o...
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ftcopernicus:oai:publications.copernicus.org:gmd109909 2024-06-23T07:56:39+00:00 CD-type discretization for sea ice dynamics in FESOM version 2 Danilov, Sergey Mehlmann, Carolin Sidorenko, Dmitry Wang, Qiang 2024-03-20 application/pdf https://doi.org/10.5194/gmd-17-2287-2024 https://gmd.copernicus.org/articles/17/2287/2024/ eng eng doi:10.5194/gmd-17-2287-2024 https://gmd.copernicus.org/articles/17/2287/2024/ eISSN: 1991-9603 Text 2024 ftcopernicus https://doi.org/10.5194/gmd-17-2287-2024 2024-06-13T01:23:00Z Two recently proposed variants of CD-type discretizations of sea ice dynamics on triangular meshes are implemented in the Finite-VolumE Sea ice–Ocean Model (FESOM version 2). The implementations use the finite element method in spherical geometry with longitude–latitude coordinates. Both are based on the edge-based sea ice velocity vectors but differ in the basis functions used to represent the velocities. The first one uses nonconforming linear (Crouzeix–Raviart) basis functions, and the second one uses continuous linear basis functions on sub-triangles obtained by splitting parent triangles into four smaller triangles. Test simulations are run to show how the performance of the new discretizations compares with the A-grid discretization using linear basis functions. Both CD discretizations are found to simulate a finer structure of linear kinematic features (LKFs). Both show some sensitivity to the representation of scalar fields (sea ice concentration and thickness). Cell-based scalars lead to a finer LKF structure for the first CD discretization, but the vertex-based scalars may be advantageous in the second case. Text Sea ice Copernicus Publications: E-Journals Geoscientific Model Development 17 6 2287 2297 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Two recently proposed variants of CD-type discretizations of sea ice dynamics on triangular meshes are implemented in the Finite-VolumE Sea ice–Ocean Model (FESOM version 2). The implementations use the finite element method in spherical geometry with longitude–latitude coordinates. Both are based on the edge-based sea ice velocity vectors but differ in the basis functions used to represent the velocities. The first one uses nonconforming linear (Crouzeix–Raviart) basis functions, and the second one uses continuous linear basis functions on sub-triangles obtained by splitting parent triangles into four smaller triangles. Test simulations are run to show how the performance of the new discretizations compares with the A-grid discretization using linear basis functions. Both CD discretizations are found to simulate a finer structure of linear kinematic features (LKFs). Both show some sensitivity to the representation of scalar fields (sea ice concentration and thickness). Cell-based scalars lead to a finer LKF structure for the first CD discretization, but the vertex-based scalars may be advantageous in the second case. |
format |
Text |
author |
Danilov, Sergey Mehlmann, Carolin Sidorenko, Dmitry Wang, Qiang |
spellingShingle |
Danilov, Sergey Mehlmann, Carolin Sidorenko, Dmitry Wang, Qiang CD-type discretization for sea ice dynamics in FESOM version 2 |
author_facet |
Danilov, Sergey Mehlmann, Carolin Sidorenko, Dmitry Wang, Qiang |
author_sort |
Danilov, Sergey |
title |
CD-type discretization for sea ice dynamics in FESOM version 2 |
title_short |
CD-type discretization for sea ice dynamics in FESOM version 2 |
title_full |
CD-type discretization for sea ice dynamics in FESOM version 2 |
title_fullStr |
CD-type discretization for sea ice dynamics in FESOM version 2 |
title_full_unstemmed |
CD-type discretization for sea ice dynamics in FESOM version 2 |
title_sort |
cd-type discretization for sea ice dynamics in fesom version 2 |
publishDate |
2024 |
url |
https://doi.org/10.5194/gmd-17-2287-2024 https://gmd.copernicus.org/articles/17/2287/2024/ |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
eISSN: 1991-9603 |
op_relation |
doi:10.5194/gmd-17-2287-2024 https://gmd.copernicus.org/articles/17/2287/2024/ |
op_doi |
https://doi.org/10.5194/gmd-17-2287-2024 |
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Geoscientific Model Development |
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17 |
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6 |
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2287 |
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2297 |
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1802649924189290496 |