[MITgcm-support] metricTerms Flag

[Martin Losch]

Hi Chris,

I think that metricTerms should always be true on a lon-lat grid, but otherwise not. The setting of this parameter should be automatic with the grid type you choose, i.e.
metricTerms=.true. for usingSphericalPolarGrid=.true.,
and false for usingCartesianGrid=.true., and usingCurviLinearGrid=.true.
For curvilinear grids, the metric terms are not explicitly implemented (except for the seaice model), but you need to use the vector invariant form of the moment equations to have them included implicitly.

Martin

On May 24, 2012, at 1:41 PM, Chris Watkins wrote:

> Hi,
> 
> I have a couple of questions regarding the metricTerms parameter.
> 
> The manual indicates on page 109 that the default value for this parameter is .FALSE. In actuality the default seems to be .TRUE. have I made a mistake somewhere?
> 
> Also exactly what terms are controlled by this parameter? I assume it is the non-underlined metric terms in equations 1.29 and 1.30. Is that right?
> 
> So, to use the "hydrostatic primitive equations" I should use metricTerms=.TRUE.?
> 
> -- 
> Chris Watkins
> 
> 
> 
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