Unidefined Dry Deposition velocity in m3dry for innermost domain of nested simulation

CMAQ Run Time Errors and Issues
1

Hello! I’ve ran into an error that I’m not finding the solution or a similar post. I’ve ran CMAQ for a coarse domain and it ran fine (or so I think, because I didn’t get any errors and I looked at the output and seemed fine). But now I’m trying to run the fine domain using icon and bcon with the regrid option. It presents an error in m3dry:

*** Subroutine: M3DRY
*** NEGATIVE or UNDEFINED Dry Deposition Velocity
*** Point = 1 33
*** Species = SO2
*** Vd = NaN

In run_cctm.csh I’ve used the same options as for the coarse domain. Could you help me find out a solution, please?
More information:
I’m using CMAQv5.5, WRF v4.3.3, MODIS landuse with 3 urban classes. Thank you!

2

Something may be wrong in your land use file. Please check your land use file (Column 1 Row 33) for NaN values. SO2 is the first species that is being computed within the dry deposition routine.

3

Thank you, Liz! Is it the files from mcip? I’ve looked at them and thought they were fine. If you know which field I should be looking at, I’d be very grateful!

4

Use the I/O API tool m3stat to see if there are any NaN values listed in the min and max values output of the input files that you are using for your fine domain CMAQ runs.

Check for NaN values in your MCIP output, and perhaps also your WRF output and/or WRF input including the geo_em.d*.nc files.

5

Thank you, I’ll do that.