Computing the geopotential gradient with a spectral transform, instead of in grid space, restores the curl-free property of the pressure gradient and eliminates spectral blocking in a global spectral weather model.
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Elimination of spectral blocking by ensuring rotation-free property of discretised pressure gradient within a spectral semi-implicit semi-Lagrangian global atmospheric model
Computing the geopotential gradient with a spectral transform, instead of in grid space, restores the curl-free property of the pressure gradient and eliminates spectral blocking in a global spectral weather model.