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

[David Ferreira]

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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