ESMPy Parallel Regrid Using MPI

As part of my ESMPy tutorial on GitHub (find it here) I have added an example script that will show how you can regrid a field in parallel and aggregate all the grid pieces after the regrid is complete. I have experienced very good speedup running the ESMF library in parallel. This is definitely useful for large grids. ESMPy already abstracts most of the MPI functions so that the user does not have to worry about them, but, with this example, it will be even easier to understand the process.

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