Dear staffs, I am working on comparing my CMAQ model output of NO2 with OMI derived NO2 vertical column density. As far as I know, I can use the IOAPI tool named vertot to do so. However, the vertot only sum up the NO2 concentration at different levels and the unit is still ppmv. Therefore, I wonde…

Hi Ryan, I did not realize that you were running an older version of CMAQ. The feature to compute NO2, CO, HCHO, and SO2 columns as part of the PHOTDIAG1 output file was introduced in CMAQv5.3. You might be able to adapt the CMAQv5.2.1 phot.F code to perform the computations introduced in CMAQv5.3…

Convert CMAQ output to vertical column density with the unit of molec/cm2

CMAQ

Ryan June 9, 2020, 3:04pm 22

Hi Christian,
Thanks for pointing it out. I will use CMAQv5.3.1 to do the simulation. Thanks!

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Convert CMAQ output to vertical column density with the unit of molec/cm2

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