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A nonhydrostatic formulation for MPAS-Ocean.
- Source :
- EGUsphere; 2/27/2024, p1-20, 20p
- Publication Year :
- 2024
-
Abstract
- The Model for Prediction Across Scales-Ocean (MPAS-Ocean) is an open-source, global ocean model and is one component of a family of climate models within the MPAS framework, including atmosphere, sea-ice, and land-ice models. In this work, a new formulation for the ocean model is presented that solves the nonhydrostatic, incompressible Boussinesq equations on an unstructured, staggered, z-level grid. The introduction of this nonhydrostatic capability is necessary for the resolution of internal wave dynamics and large eddy simulations. Compared to the standard, hydrostatic formulation, a nonhydrostatic pressure solver and a vertical momentum equation are added, where the PETSc (Portable Extensible Toolkit for Scientific Computation) library is used for the inversion of a large sparse system for the nonhydrostatic pressure. Numerical results on a stratified seiche, internal solitary wave, overflow and lock-exchange test cases are presented, and the parallel efficiency of the code is evaluated using up to 128 processors. [ABSTRACT FROM AUTHOR]
- Subjects :
- LARGE eddy simulation models
INTERNAL waves
ATMOSPHERIC models
BOUSSINESQ equations
Subjects
Details
- Language :
- English
- Database :
- Complementary Index
- Journal :
- EGUsphere
- Publication Type :
- Academic Journal
- Accession number :
- 175704490
- Full Text :
- https://doi.org/10.5194/egusphere-2024-472