Analysis of instabilities and mesoscale motion in a terrain-following coordinate ocean model

2006 ◽  
Vol 64 (3) ◽  
pp. 319-353 ◽  
Author(s):  
Ingerid Fossum ◽  
Lars Petter Røed
Keyword(s):  
Ocean Model ◽  
Terrain Following ◽  
Mesoscale Motion

scholarly journals A dike–groyne algorithm in a terrain-following coordinate ocean model (FVCOM): Development, validation and application

2012 ◽  
Vol 47 ◽  
pp. 26-40 ◽  
Author(s):  
Jianzhong Ge ◽  
Changsheng Chen ◽  
Jianhua Qi ◽  
Pingxing Ding ◽  
Robert C. Beardsley
Keyword(s):  
Ocean Model ◽  
Terrain Following

NH-GOMO, an efficient and easily portable non-hydrostatic ocean model

2020 ◽  
Author(s):  
Qiang Tang ◽  
Xiaomeng Huang ◽  
Xing Huang
Keyword(s):  
Dynamic Pressure ◽  
Bottom Layer ◽  
Ocean Model ◽  
Test Cases ◽  
Fine Grid ◽  
Poisson Solver ◽  
Implicit Finite Difference Scheme ◽  
Terrain Following ◽  
Computing Platforms ◽  
Parallel Operator

<p>Numerical simulation of nonlinear gravity internal waves with non-hydrostatic ocean models, especially these which using the terrain-following sigma-coordinate, is challenging. The expensive computation cost, which is caused by the dynamic pressure Poisson solver in cases using fine grid resolution in both directions (horizontal and vertical), is the main reason. A non-hydrostatic ocean model named NH-GOMO is constructed based on a partially implicit finite difference scheme for the dynamic pressure and adopts an idea of “decimation and interpolation”. A significant optimization for the pressure Poisson solver, which brings no obvious accuracy loss, is obtained with these technologies. The automatic parallel operator library named OpenArray is used as the bottom layer of this model and make it easy to transport between different computing platforms. Accuracy and efficiency have been validated by several ideal test cases.</p>

scholarly journals Developing a coupled ice sheet-ocean model: challenges and progress with terrain-following ocean coordinates

2019 ◽  
Author(s):  
Stefanie Mack ◽  
Daniel Shapero ◽  
Rupert Gladstone ◽  
David Gwyther ◽  
Ben Galton-Fenzi ◽  
...  
Keyword(s):  
Ice Sheet ◽  
Ocean Model ◽  
Terrain Following

scholarly journals FESOM-C: coastal dynamics on hybrid unstructured meshes

2018 ◽  
Author(s):  
Alexey Androsov ◽  
Vera Fofonova ◽  
Ivan Kuznetsov ◽  
Sergey Danilov ◽  
Natalja Rakowsky ◽  
...  
Keyword(s):  
Finite Volume ◽  
Model Performance ◽  
Unstructured Meshes ◽  
Ocean Model ◽  
Hybrid Mesh ◽  
Vertical Coordinate ◽  
Time Stepping ◽  
Hybrid Meshes ◽  
Terrain Following ◽  
Triangular Cell

Abstract. We describe FESOM-C, the coastal branch of the Finite-volumE Sea ice -- Ocean Model (FESOM2), which shares with FESOM2 many numerical aspects, in particular, its finite-volume cell-vertex discretization. Its dynamical core differs by the implementation of time stepping, the use of terrain-following vertical coordinate and formulation for hybrid meshes composed of triangles and quads. The first two distinctions were critical for coding FESOM-C as an independent branch. The hybrid mesh capability improves numerical efficiency, since quadrilateral cells have fewer edges than triangular cells. They do not suffer from spurious inertial modes of the triangular cell-vertex discretization and need less dissipation. The hybrid mesh capability allows one to use quasi-quadrilateral unstructured meshes, with triangular cells included only to join quadrilateral patches of differt resolution or instead of strongly deformed quadrilateral cells. The description of the model numerical part is complemented by test cases illustrating the model performance.

Evaluation of the Ocean Circulation for the Solomon Sea Using the Regional Ocean Modeling System (ROMS)

2019 ◽  
Author(s):  
A. Rute Bento ◽  
Henrique Coelho ◽  
Chunxue Yang
Keyword(s):  
Ocean Circulation ◽  
Initial Conditions ◽  
Ocean Model ◽  
Heat Fluxes ◽  
Ocean Modeling ◽  
Regional Ocean Modeling System ◽  
Circulation Patterns ◽  
Terrain Following ◽  
Adcp Measurements ◽  
Main Circulation

Abstract The Regional Ocean Modeling System (ROMS) is a free-surface, terrain-following, primitive equations ocean model and it was implemented to perform a high-resolution 10-year hindcast study of Solomon’s Sea circulation patterns. The model was executed with a resolution of 1/36°, initial conditions from HYCOM+NCODA Global 1/12° and was forced by CFSR/CFSV2 momentum, mass and heat fluxes. The model was validated by comparing the simulated temperatures, salinities and flow patterns with satellite data, Argo floats and Ship ADCP measurements. In general, the model captured the main circulation patterns and performed well for the Solomon Sea. The modelled Temperature and Salinity profiles were comparable with the observations, with some error variability in the thermocline layer, which agreed with previous studies.

scholarly journals Seasonal and interannual variability of the southern south Equatorial Current bifurcation and meridional transport along the eastern brazilian edge.

2011 ◽  
Vol 39 (1) ◽  
Author(s):  
Dóris R A VELEDA ◽  
Moacyr ARAÚJO ◽  
Marcus SILVA ◽  
Raul MONTAGNE ◽  
Rodolfo ARAÚJO
Keyword(s):  
Field Measurements ◽  
Ocean Model ◽  
Numerical Results ◽  
Seasonal Migration ◽  
Meridional Transport ◽  
South Equatorial Current ◽  
The North ◽  
North Brazil ◽  
Terrain Following ◽  
Equatorial Current

The dynamics of the southern band of the South Equatorial Current (sSEC) near to Brazilian shelf is investigated using recent field observations and a regional numerical modeling approach. The field measurements were obtained from five moorings deployed by German CLIVAR (Climate Variability and Predictability Program) cruises (March 2000- August 2004) along a crossshore line at 11oS. The Regional Ocean Model (ROMS) is used to simulate the circulation and thermohaline structures within the ocean area comprised between 5°S-25°S and 20°W-47°W. This integration domain was covered by an isotropic 1/12o horizontal grid and 40 terrain-following layers. The numerical results confirm a seasonal migration of the sSEC divergence along the Brazilian edge, as well as its depth dependence with a maximum southward shift in July at 200 m depth, while a maximum northward displacement occurs in November at this same depth. This intrannual variability coincides with the North Brazil Undercurrent (NBUC) seasonality at 11oS from moorings measurements. Empirical Orthogonal Function (EOF) and numerical results show a minimum NBUC strength during November and a maximum northward transport in July. The mean transport from field measurements is 25Sv while this from numerical simulations is 24.5Sv. The SODA reanalysis with 47 years of monthly mean indicates that the sSEC has not only a seasonal variability as well as quasi-biannual variability.

scholarly journals FESOM-C v.2: coastal dynamics on hybrid unstructured meshes

2019 ◽  
Vol 12 (3) ◽  
pp. 1009-1028 ◽  
Author(s):  
Alexey Androsov ◽  
Vera Fofonova ◽  
Ivan Kuznetsov ◽  
Sergey Danilov ◽  
Natalja Rakowsky ◽  
...  
Keyword(s):  
Finite Volume ◽  
Model Performance ◽  
Unstructured Meshes ◽  
Ocean Model ◽  
Hybrid Mesh ◽  
Vertical Coordinate ◽  
Time Stepping ◽  
Hybrid Meshes ◽  
Terrain Following ◽  
Triangular Cell

Abstract. We describe FESOM-C, the coastal branch of the Finite-volumE Sea ice – Ocean Model (FESOM2), which shares with FESOM2 many numerical aspects, in particular its finite-volume cell-vertex discretization. Its dynamical core differs in the implementation of time stepping, the use of a terrain-following vertical coordinate, and the formulation for hybrid meshes composed of triangles and quads. The first two distinctions were critical for coding FESOM-C as an independent branch. The hybrid mesh capability improves numerical efficiency, since quadrilateral cells have fewer edges than triangular cells. They do not suffer from spurious inertial modes of the triangular cell-vertex discretization and need less dissipation. The hybrid mesh capability allows one to use quasi-quadrilateral unstructured meshes, with triangular cells included only to join quadrilateral patches of different resolution or instead of strongly deformed quadrilateral cells. The description of the model numerical part is complemented by test cases illustrating the model performance.

Sign in / Sign up

Export Citation Format

Share Document