A nonhydrostatic oceanic regional model, ORCTM v1, for internal solitary wave simulation
<p>The Oceanic Regional Circulation and Tide Model (ORCTM), including a nonhydrostatic dynamics module which can numerically reproduce internal solitary wave (ISW) dynamics, is presented in this paper. The performance of a baroclinic tidal simulation is also examined in regional modeling with...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2023-01-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://gmd.copernicus.org/articles/16/109/2023/gmd-16-109-2023.pdf |
| Summary: | <p>The Oceanic Regional Circulation and Tide Model (ORCTM), including a
nonhydrostatic dynamics module which can numerically reproduce internal
solitary wave (ISW) dynamics, is presented in this paper. The performance
of a baroclinic tidal simulation is also examined in regional modeling
with open boundary conditions.</p>
<p>The model control equations are characterized by three-dimensional and
fully nonlinear forms considering incompressible Boussinesq fluid in
<span class="inline-formula"><i>Z</i></span> coordinates. The pressure field is decomposed into the surface,
hydrostatic, and nonhydrostatic components on the orthogonal curvilinear
Arakawa-C grid. The nonhydrostatic pressure determined by the intermediate
velocity divergence field is obtained via solving a three-dimensional
Poisson equation based on a pressure correction method. Model validation
experiments for ISW simulations with the topographic change in the
two-layer and continuously stratified ocean demonstrate that ORCTM has a
considerable capacity for reproducing the life cycle of internal solitary
wave evolution and tide–topography interactions.</p> |
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| ISSN: | 1991-959X 1991-9603 |