When I compared my CCTM output with the observation, I find the O3 value is much higher than the observation data. I searched the previous discussion https://www.cmascenter.org/cmaq/documentation/4.6/ADVECTION_DIFFUSION.txt . From the .txt, I guess there might be some mistakes with the Kzmin setting. I checked my GRIDCRO2D file and found the values of PURB are either -9.999*e+36 or 0.
I also found the discussion about the PURB MCIP cannot generate PURB (percentage of urban area) . Compared with the discussion, the LANDUSEF values in my geo_em.d01.nc file are between 0 and 1, and I did use the correct geo_em.d01.nc in the mcip script.
My question is that are the values of PURB correct? If not, how can I correct it? Thanks in advance!