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MPAS-A tool to create custom regional mesh

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bgrasic

New member
Hello everyone!

I am familiar with creating regional meshes from existing meshes available on the "MPAS-Atmosphere Meshes" website.

I wonder if there exists an open source tool for creating a custom regional mesh for MPAS-A model or maybe a tutorial?

Is there a thread on this forum that I missed?

I'm mainly interested in whether it would be possible to create a mesh based on a set of points given in WGS coordinates?

Regards, Boštjan
 
Hello @bgrasic, this depends on what level of customization you're looking for. The most supported workflow is to cut out a smaller area from some existing (almost always global) mesh. In general this is documented in Section 3 of the MPAS Tutorial which you can access at MPAS Tutorial — Practice Session Guide.

General procedure:
  1. Download a (global) grid for whatever resolution you want (including variable resolution) from mpas-dev.github.io > MPAS-Atmosphere Download > MPAS-Atmosphere meshes.
  2. Sub-set the mesh with the MPAS Limited-Area tool from MPAS-Dev/MPAS-Limited-Area GitHub repo. The README explains the process, it supports a few specifications including using lat/lon points to define your new mesh's shape.
  3. If needed, use the grid_rotate tool to center your new grid over the region of interest. Tool comes from MPAS-Dev/MPAS-Tools GitHub repo / mesh_tools / grid_rotate.
Other tools may exist, but this is what I've used as a MPAS developer.
 
Thank you for your answer. I am already familiar with proposed procedure and I am using it already.
I had in mind more customized level, so I guess I will wait for a while until some other tools appear.
 
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