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Preprints
https://doi.org/10.5194/egusphere-2024-472
https://doi.org/10.5194/egusphere-2024-472
27 Feb 2024
 | 27 Feb 2024
Status: this preprint has been withdrawn by the authors.

A nonhydrostatic formulation for MPAS-Ocean

Sara Calandrini, Darren Engwirda, and Luke Van Roekel

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.

This preprint has been withdrawn.

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This preprint has been withdrawn.

Short summary
Most modern ocean circulation models only consider the hydrostatic pressure, but for coastal...
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