Error creating initial conditions with NCEP FNL ds083.2

[ptondreau]

Hello WRF&MPAS-A Forum Members,

I'm trying to create the initial conditions file for MPAS (v8.1) using data obtained from the NCEP FNL ds083.2. I've successfully completed the previous steps, including creating the MPAS grid and executing ungrib from WPS (using v4.5) for the provided data. However, I've encountered a critical error when running "init_atmosphere_model" to generate the init.nc file.

Here's the error message I received:
CRITICAL ERROR: Error in interpolation of st_fg to MPAS grid: num_st = 1686

I've tried different grids, 60-3km, 92-25km, 120km but all output the same error.

I'm unsure how to proceed from here and would greatly appreciate any guidance or insights from the community.

Logs and namelist are provided.
Thank you in advance

Best regards

 

[ptondreau]

Finally figured it out.

Just had to change config_nfgsoillevels to 2 and config_extrap_airtemp to linear in namelist.init_atmosphere. Once those two modifications were made init_atmosphere_model and atmosphere_model ran without issues.

 

[Ming Chen]

Hi,
Thank you for the update. Note that FNL data only contains 2-level of soil information, which is why we need to set config_nfgsoillevels=2.
The top of the FNL data is 10 hpa, and therefore extrapolation is needed if MPAS top level is above 10 hpa.

For the option of config_extrap_airtemp, would you please let me know what is the model top of your MPAS run? Thanks.