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Subsections
The forcing terms
on the rhs of the equations are provided by
`physics packages' and forcing packages. These are described later on.
Many forms of momentum dissipation are available in the model. Laplacian and
biharmonic frictions are commonly used:

(1.41) 
where and are (constant) horizontal and vertical viscosity
coefficients and is the horizontal coefficient for biharmonic
friction. These coefficients are the same for all velocity components.
The mixing terms for the temperature and salinity equations have a similar
form to that of momentum except that the diffusion tensor can be
nondiagonal and have varying coefficients.

(1.42) 
where
is the diffusion tensor and the
horizontal coefficient for biharmonic diffusion. In the simplest case where
the subgridscale fluxes of heat and salt are parameterized with constant
horizontal and vertical diffusion coefficients,
,
reduces to a diagonal matrix with constant coefficients:

(1.43) 
where and are the horizontal and vertical diffusion
coefficients. These coefficients are the same for all tracers (temperature,
salinity ... ).
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Up: 1.3 Continuous equations in
Previous: 1.3.6 Finding the pressure
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