Define FiniteDifferenceSpace for extruded spaces #2344
Merged
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The failure here revealed that ClimaDiagnostics.jl is reconstructing the vertical grid, via
_FiniteDifferenceGrid
, which is not efficient (we can instead just return a pointer) and will become gpu-incompatible in #2343 (as the mesh, once made, will be moved to the gpu).This PR defines
FiniteDifferenceSpace(space::ExtrudedFiniteDifferenceSpace)
which avoids that code path and reconstructs a new grid with the same backing data.I suppose I should add this to ClimaDiagnostics, so that I can test it in ClimaAtmos, as this is the only place where this functionality seems to be exercised. I'll do that now, but this feature should probably exist in ClimaCore.