A Generalization of a Sigma Coordinate Ocean Model
â
A
1000 - " " " - 1 0 - - ' 0
B
~=-600~, . . . _ , .
-----...::::,2_\2
1000 _
10 _ _ '0
1600 _
8
_ _ _
....
-
b - - b
o I 10 16 ~ U » ~ ~ ~ N M • •
..........
- 8 _ 8
b - - b
Fig.4.7 Same as Fig. 4.4, but for the low viscosity case with AM =10 3 m 2 s -1 .
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tracting the area averaged density before evaluating density gradients and performing the baroclinic integrals in (14) and (15) or (22) and (23). By running the
straight cr model with no wind forcing and with no subtraction of the area averaged
density, the maximum velocity and rms errors were approximately 2.5 cm s-I and
0.15 cm s-I in the high viscosity case and 5.0 cm s-I and 0.30 cm s-l in the low viscosity case; the maximum errors were located in the shallowest regions along the
ea stern and western boundaries. The maximum velocity errors in the generalized
sigma model were about the same although the prior expectation was that they
would be smaller. In both cases, the maximum vertically averaged velocities were