Work in progress!!!

Global physics fields

As you hopefully already know, GEM can run in parallel, using MPI and/or OpenMP. In the physics, when using MPI, the model domain gets horizontally divided into tiles, or rather cubes. Each MPI process is taking care of one of these cubes.

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• the surface bus itself
• the size of the surface bus
• the new starting addresses of the variable in the surface bus and
• the number of variables

Explain what a bus is: slab with just land points etc.

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