bruceyoung01
Member
I plan to generate 1-3-12 km MPAS variable-resolution mesh for our MPAS simulation over the Baltimore-Washington area. I was wondering whether it is feasible based on the current capacity of MPAS. Thanks.
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Generate 1-3-12 km MPAS variable-resolution mesh
- Thread starter bruceyoung01
- Start date
Hi, bruceyoung01,
The MPAS Limited-Area Tool can be used to subset a variable-resolution regional mesh. The most closest mesh I can find is the 60-12km mesh posted in MPAS home page. You need to:
(1) run grid_rotate to relocate the fine-mesh area to Baltimore-Washington area,
(see grid_rotate at MPAS-Tools/mesh_tools/grid_rotate at master · MPAS-Dev/MPAS-Tools)
(2) run MPAS Limited-Area Tool to subset a regional mesh
(see GitHub - MPAS-Dev/MPAS-Limited-Area: Python tool to create a regional subset of a global MPAS Mesh)
(3) scale the regional mesh to higher resolution using scale_region utility.
(GitHub - mgduda/scale_region: A Python tool for scaling regional MPAS meshes)
This will give you a 12-3km mesh that roughly meet your need. However, this mesh cannot go up to 1-km resolution.
If you really need the 1-km mesh, I am thinking that you may need to create a 12-3-1km mesh yourself. The mesh-generation tool is probably able to do so. Honestly, I haven't used this tool to produce high-resolution nested mesh myself. So I am not 100% sure how it works.
More details can be found at 71_duda.pdf.
Michale gave a talk on how to work with the mesh-generation package. Please see
Hope this is helpful for you.
The MPAS Limited-Area Tool can be used to subset a variable-resolution regional mesh. The most closest mesh I can find is the 60-12km mesh posted in MPAS home page. You need to:
(1) run grid_rotate to relocate the fine-mesh area to Baltimore-Washington area,
(see grid_rotate at MPAS-Tools/mesh_tools/grid_rotate at master · MPAS-Dev/MPAS-Tools)
(2) run MPAS Limited-Area Tool to subset a regional mesh
(see GitHub - MPAS-Dev/MPAS-Limited-Area: Python tool to create a regional subset of a global MPAS Mesh)
(3) scale the regional mesh to higher resolution using scale_region utility.
(GitHub - mgduda/scale_region: A Python tool for scaling regional MPAS meshes)
This will give you a 12-3km mesh that roughly meet your need. However, this mesh cannot go up to 1-km resolution.
If you really need the 1-km mesh, I am thinking that you may need to create a 12-3-1km mesh yourself. The mesh-generation tool is probably able to do so. Honestly, I haven't used this tool to produce high-resolution nested mesh myself. So I am not 100% sure how it works.
More details can be found at 71_duda.pdf.
Michale gave a talk on how to work with the mesh-generation package. Please see
Hope this is helpful for you.
Last edited:
bruceyoung01
Member
Thank you for sharing the procedure and materials to generate meshes. I am following these steps to generate 12-3-1 km meshes. While working on it, one of my concerns is whether MPAS can support 1-km meshes. I know there are some physics schemes supporting convection-allowing with a resolution of 3 km meshes. Do you know any references on 1-km meshes?
MPAS works on 1-km mesh. At this resolution PBL assumptions are still valid and scale-aware cumulus scheme (New Tiedtke scheme) can be implemented to handle convection.
We haven't done many MPAS simulations with 1-km resolution mesh. There might have some issues we are not aware of. Please let us know if you have any problems running MPAS with your 12-3-1km mesh. Thanks.
We haven't done many MPAS simulations with 1-km resolution mesh. There might have some issues we are not aware of. Please let us know if you have any problems running MPAS with your 12-3-1km mesh. Thanks.
bruceyoung01
Member
It is great to confirm that MPAS works on the 1-km mesh. I will let you know if I have any issues with MPAS.