[MITgcm-support] calculate zonal mean winds in cube-sphere grid

[Yuan Lian]

Hi David,

Thanks a lot for your help. I have one more problem needs to be solved.
I am trying to calculate the zonal mean of UVtave data in cube-sphere. I am
not sure how to do this since UV values are at the corners of the C-grid 
cell.

Thanks again for the help!

Yuan

David Ferreira wrote:
> Hi Yuan,
> You can't use "calcZonalAvgCube.m" straight on the cube
> u and v fields because it doesn't rotate the cube velocities
> to the "normal" [U(West to East),V(South to North)]
> and it assumes the input field is at the tracer points.
> However, this is exactly what rotate_uv2uvEN.m does.
> So first, use rotate_uv2uvEN and then you plug the outputs
> into calcZonalAvgCube
> david
>
> Yuan Lian wrote:
>> Hi,
>>
>> I am trying to calculate the zonal mean zonal winds and meridional winds
>> in cube-sphere grid. The Matlab script "calcZonalAvgCube.m" can 
>> calculate
>> cell centered quantities. Does anyone know how to calculate the zonal
>> mean quantities at faces of grids, ie, zonal wind "u" and meridional 
>> wind "v"?
>>
>> I used to convert cube-sphere quantities to latlon grid by using 
>> uvcube2latlon.m.
>> I would like to know how to do this natively in cube-sphere grid.
>>
>> I tried to use "calcZonalAvgCube.m" with "ar"="rAw" but the zonal mean
>> values are different from that calculated by uvcube2latlon.m (2x 
>> smaller).
>>
>> Thanks for any help!
>>
>> Yuan
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>
>