[MITgcm-support] hfac question

[Matthew Mazloff]

Hi David,

This is correct.  You must have sloping topography and the depth at  
the west side of the cell is 90m, while its 100m in the center.  U is  
calculated on the west face, so the total volume transport is
sum(U(1,:).*drF .* hfacW(1,:)).

Likewise one should use hFacS for V transport.

-Matt


On Oct 6, 2009, at 8:38 AM, David Hebert wrote:

> Hi all,
>
> I am attempting to balance barotropic inflow/outflow on the  
> boundaries of a 2D simulation. I ran the model one timestep to  
> obtain the hFac's in order to more accurately determine the depth  
> the model uses. The result from Depth.data at one point is 100m.
>
> In order to balance U, according to manual, I would use hFacW. I get  
> a very different result if I do sum(drF * hFacW). Results from  
> matlab (for 2D hFac's)...
>
> sum(drF .* hfacW(1,:)) = 90
> sum(drF .* hfacC(1,:)) = 100
>
> Seems I don't quite understand hfacW. Any ideas on what I did wrong  
> here?
>
> Thanks
>
> David
>
>
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