**Quote:**

It depends. If ROMS has to interpolate and rotate the winds, it wants them at rho points. If you have already interpolated and rotated them, then Uwind is at u-points and Vwind is at v-points.

I don't think that's correct. Stresses sustr,svstr are at the corresponding u,v points, but the wind components Uwind,Vwind are always represented at rho-points, even after they are interpolated from a simple gridded input file that is not aligned with the ROMS grid.

This is apparent in code that uses Uwind,Vwind like Nonlinear_bulk_flux.F. There you see that the wind stress components Taux,Tauy are computed at rho-points, and only at the end are they mapped to the velocity points with a step like:

**Code:**

sustr(i,j)=cff*(Taux(i-1,j)+Taux(i,j))

...

svstr(i,j)=cff*(Tauy(i,j-1)+Tauy(i,j))

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John Wilkin: DMCS Rutgers University

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