Preprints
https://doi.org/10.5194/gmd-2022-151
https://doi.org/10.5194/gmd-2022-151
Submitted as: model description paper
06 Jul 2022
Submitted as: model description paper | 06 Jul 2022
Status: this preprint is currently under review for the journal GMD.

A nonhydrostatic oceanic regional model ORCTM v1 for internal solitary wave simulation

Hao Huang1, Pengyang Song1,2, Shi Qiu1, Jiaqi Guo1, and Xueen Chen1 Hao Huang et al.
  • 1College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao, 266100, China
  • 2Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany

Abstract. An Oceanic Regional Circulation and Tide Model (ORCTM version 1) including the nonhydrostatic dynamics module which can numerically reproduce the Internal Solitary Waves (ISWs) dynamics, is presented in this paper. The model open boundary conditions are also supportive of regional baroclinic tidal wave simulations.

The incompressible Boussinesq equations in z-coordinates consider the three-dimensional and fully nonlinear forms. The pressure field is also 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 ISWs simulations with the topographic change in the two-layer and continuously stratified ocean demonstrate that the ORCTM has a considerable capacity for reproducing the life cycle of Nonlinear Internal Waves evolution and tide-topography interactions.

Hao Huang et al.

Status: open (until 13 Sep 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2022-151', Anonymous Referee #1, 11 Jul 2022 reply
    • AC1: 'Reply on RC1', Hao Huang, 11 Jul 2022 reply

Hao Huang et al.

Hao Huang et al.

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Short summary
We developed an Oceanic Regional Circulation and Tide Model (ORCTM) which can reproduce the nonhydrostatic dynamics. The three-dimensional nonlinear momentum equations are involved with the nonhydrostatic pressure obtained via solving the Poisson equation. The validation experiments results agree with the Internal wave theories and demonstrate that the ORCTM can successfully describe the life cycle of nonhydrostatic and nonlinear Internal Solitary Waves under different oceanic environments.