Comparaison des versions

Légende

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The pilot region or halo contains only the driving interpolated to the model grid. The model need this region to check where the air comes from but the dynamics do not do any calculations in this region. Usually 10 points wide.

In the blending/merging area, also called Davies sponge, the model results get merged with the driving data, giving more weight to the driving data on the outside and more to the model results on the inside, following a cos2 curve. This is also the grid specified in the gem_settings.nml. Usually 10 points wide.

The free area contains only the model results. Usually, this is the grid used for the model output.

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Grids of GEM version 4 and up are horizontally (Arakawa C-grid) and vertically staggered.

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