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1. Interpolate to lat/lon grid first. (both PG2 and GLL data)
This is the The most common approach is to interpolate the data to a FV latitude longitude grid, either “cap” or offset: CAM-FV Grid Overview . This allows one to use a wide variety of visualization software. Offline interpolation is quick and painless with NCO’s ncremap.
For GLL data, the best algorithm to use (see Transition to TempestRemap for Atmosphere grids ) is TempestRemap’s “intbilin”, as this map is accurate, monotone, and can be used for both downscaling and upscalingsupscaling. The only drawback is that it is not exactly conservative. If exact conservation is needed (so that the mass computed on the interpolation grid is the same as on the native grid), then TempestRemap’s “mono” should be used.
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