grid_rotate to rotate topography?

[dkmiller]

I will be using the 60_3km variable MPAS nest (having a circular transition zone) to run simulations on a case study of interest in the mid-latitudes. Using the rotate aspect of the 'grid_rotate' utility appears foolish for a grid having a circular transition zone. However, I'm wondering if the 'rotate' will actually work to rotate the underlying surface fields (e.g. topography) as I am interested in investigating the impact of topography on the simulated precipitation.

 

[Ming Chen]

Hi Dkmiller,

When you run grid_rotate to relocate a refinement to a different region, the input file must be a MPAS grid datafile. It should never be a static data file, because all the time-invariant fields (terrain, vegtype, soil etc) are different in different regions.

For your case, if you only need to modify terrain height for sensitivity test, then I would suggest that you create static.nc for your region, then modify terrain in the static.nc file.

Hope this is helpful.Please let me know if you have more questions.