Split-explicit external mode solver in finite volume sea ice ocean model FESOM2
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866914953024241664 |
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| author | Banerjee, Tridib Scholz, Patrick Danilov, Sergey Klingbeil, Knut Sidorenko, Dimitry |
| author_facet | Banerjee, Tridib Scholz, Patrick Danilov, Sergey Klingbeil, Knut Sidorenko, Dimitry |
| contents | A novel split-explicit (SE) external mode solver for the Finite volumE Sea ice-Ocean Model (FESOM2) is presented. It is compared with the semi-implicit (SI) solver currently used in FESOM2. The SE solver utilises a dissipative asynchronous (forward-backward) time-stepping scheme. Its implementation with Arbitrary Lagrangian-Eulerian (ALE) vertical coordinates like Z-star and Z-tilde is explored. The comparisons are performed through multiple test cases involving idealised and realistic global simulations. The SE solver demonstrates lower phase errors and dissipation, but maintain a simulated mean ocean state very similar to the SI solver. The SE solver is also shown to possess better run-time performance and parallel scalability across all tested workloads. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2311_08241 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Split-explicit external mode solver in finite volume sea ice ocean model FESOM2 Banerjee, Tridib Scholz, Patrick Danilov, Sergey Klingbeil, Knut Sidorenko, Dimitry Atmospheric and Oceanic Physics Computational Physics A novel split-explicit (SE) external mode solver for the Finite volumE Sea ice-Ocean Model (FESOM2) is presented. It is compared with the semi-implicit (SI) solver currently used in FESOM2. The SE solver utilises a dissipative asynchronous (forward-backward) time-stepping scheme. Its implementation with Arbitrary Lagrangian-Eulerian (ALE) vertical coordinates like Z-star and Z-tilde is explored. The comparisons are performed through multiple test cases involving idealised and realistic global simulations. The SE solver demonstrates lower phase errors and dissipation, but maintain a simulated mean ocean state very similar to the SI solver. The SE solver is also shown to possess better run-time performance and parallel scalability across all tested workloads. |
| title | Split-explicit external mode solver in finite volume sea ice ocean model FESOM2 |
| topic | Atmospheric and Oceanic Physics Computational Physics |
| url | https://arxiv.org/abs/2311.08241 |