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Setting up a WPS domain for the limited-area MPAS simulations

nakulkarle

New member
I am trying to run limited-area MPAS simulations over the south-central USA. However, having difficulties setting up a domain for the WPS. Any tips regarding the WPS namelist will be much appreciated.
Thank you.
 
Hi,
You only need to run ungrib.exe of WPS to produce the intermediate format datafiles, which are later used for generation of lateral boundary fata for regional MPAS run. You don't need to specify domain and run geogrid.exe.
 
Hi,
You only need to run ungrib.exe of WPS to produce the intermediate format datafiles, which are later used for generation of lateral boundary fata for regional MPAS run. You don't need to specify domain and run geogrid.exe.
Hi Ming,
That was helpful. Thank you so much.

I have a follow-up question.
I am trying to use 60-km – 3-km mesh for running limited area simulation. While interpolating initial regional conditions, I get the following error msg when I run the init_atmosphere_model program with 36 MPI tasks.

----------------------------------------------------------------------

Beginning MPAS-init_atmosphere Output Log File for task 0 of 36

Opened at 2023/06/22 15:17:21

----------------------------------------------------------------------





Using default single-precision reals



Reading namelist from file namelist.init_atmosphere

Reading streams configuration from file streams.init_atmosphere

Found mesh stream with filename template texas.static.nc

Using default io_type for mesh stream

** Attempting to bootstrap MPAS framework using stream: input

Bootstrapping framework with mesh fields from input file 'texas.static.nc'

ERROR: Could not open block decomposition file for 36 blocks.

CRITICAL ERROR: Filename: texas.graph.info.part36



-----------------------------------------

Total log messages printed:

Output messages = 9

Warning messages = 0

Error messages = 1

Critical error messages = 1

-----------------------------------------

Could you please help me understand what I am doing wrong and what parameters I need to change?
Thank you.
 
I found the error message in your log file: "ERROR: Could not open block decomposition file for 36 blocks."

This indicates that you try to run the model with 36 processors, however, in your working directory, there is no file "texas.graph.info.part.36"

Please double check your files and make sure you have the decomposition file.
 
I found the error message in your log file: "ERROR: Could not open block decomposition file for 36 blocks."

This indicates that you try to run the model with 36 processors, however, in your working directory, there is no file "texas.graph.info.part.36"

Please double check your files and make sure you have the decomposition file.
Thank you so much. I found out the issue and managed to resolve it.
 
Last edited:
Would you please clarify how you fix this issue just in case other users may have the same problem? Thank you.
 
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