[MITgcm-support] XU, YU and XV, YV coordinates in the curvilinear grid...

[Martin Losch]

Simone,

the location of the velocity points is the same on all of the grids.
I am afraid, you'll have to compute XU/YU, and XV/YV yourself as averages of XC/G, and YC/G. That's usually good enough.

Martin

On Oct 24, 2012, at 11:51 AM, Simone Sammartino wrote:

> Hi
> I’m working on outputs on a curvilinear grid...
> I saw that the X-YU and X-YV grid are written in the NETCDF case (http://mitgcm.org/viewvc/MITgcm/MITgcm/model/src/write_grid.F?view=markup),  but it seems they are not in the binary output format case.
> The U coordinates are defined as XU=XG and YU=YC and the V coordinates as XV=XC and YV=YG, but it is correct only in the case of a cartesian grid.
> It does not correspond to the real U and V coordinates on a curvilinear grid, which instead depends on the angle in X-YC.
> So, two questions:
> - Where are located the U and V vectors in the curvilinear grid?
> - Why the X-YU and X-YV grid are not written in the binary output format?
>  
> Thank you in advance
>  
> Simone
>  
> -------------------------------------
> Simone Sammartino
> Physical Oceanography Research Group
> University of Málaga
> GOFIMA
> Campus Teatinos s/n
> ETSI Telecomunicación
> 29071 Málaga (Spain)
> 
> Tel: +34 952 13 28 49
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