64 George L. Mellor, Sirpa M. Hăkkinen, Tai Ezer and Richard C. Patchen
A
B
c
Fig. 4.2 Vertical grids in a nort -south cross section at the center of the domain: ( a) the z -
level grid, (b) the conventional sigma coordinate grid and (c) the generalized sigma grid.
The grid in (c) is dominated by z coordinates in the deep ocean, but follows the topography
like sigma coordinates near the sloping bottom with layers converging to create a well
resolved bottom boundary layer.
tropic Rossby wave theory. Experiments (not shown) with even smaUer viscosity
of AM = 10 2 m 2 s- 1 , stiU show similar results for the sigma grid calculations, but
with somewhat more intense Rossby waves.
Other calculations have been performed. They include a lower resolution, 2° x
2°, on a 26 x 38 x 11 grid and the same topography, initial conditions and surface
forcing as before. The viscosity was rai sed to A M = 5 x 10 5 m 2 s- 1 and AH = 0.2 AM.
A
B
c
Fig. 4.2 Vertical grids in a nort -south cross section at the center of the domain: ( a) the z -
level grid, (b) the conventional sigma coordinate grid and (c) the generalized sigma grid.
The grid in (c) is dominated by z coordinates in the deep ocean, but follows the topography
like sigma coordinates near the sloping bottom with layers converging to create a well
resolved bottom boundary layer.
tropic Rossby wave theory. Experiments (not shown) with even smaUer viscosity
of AM = 10 2 m 2 s- 1 , stiU show similar results for the sigma grid calculations, but
with somewhat more intense Rossby waves.
Other calculations have been performed. They include a lower resolution, 2° x
2°, on a 26 x 38 x 11 grid and the same topography, initial conditions and surface
forcing as before. The viscosity was rai sed to A M = 5 x 10 5 m 2 s- 1 and AH = 0.2 AM.