Hi everyone.
I’m trying to run CMAQv5.3.2 simulations in East Asia.
I use the program which in the folder “CMAQ5.3.2/PREP/create_omi” to create high resolution OMI file.I set up nlat = 719, and nlon = 1441.
I have successfully run the case, but the result is very different with using the default OMI file.
When I check the IRR file, I found that the result using high resolution OMI file has some error.
I also try to use low resolution OMI file.I set up nlat = 361, and nlon = 361.
The result is very similar with using the default OMI file.
How high is the resolution of the OMI data? Is it reasonable to generate data at the resolution you are attempting? Have you visualized the ozone column data, as done here?
For the CMAQ OMI file with 719X1441 resolution, format statements may cause daily data to not be written on one line.
Please make and test the below changes to PREP/create_omi/src/module_utilities.f. The exact line numbers may be off based on your text editor but I hope that you understand these suggestions.
Hi bhutzell,
Thank you for your help.
I have changed the code and created the new OMI file with 719X1441 resolution.
The output of IRR_10 became correct!
This picture is useing FIX OMI file(719x1441).
Hi bhutzell,
I used the program creat_omi to creat OMI file in 2020, and I changed the file path in CCTM run script, but there is no difference in O3 concentration between using the updated OMI file in 2020 and the default file ( I also want to know where the default OMI file is If I didn’t update OMI file in 2020).
set OMIpath = /home/CMAQv5.3.2/PREP/create_omi/scripts/output/omi_intel_2020_361X361
Did I call the file correctly? Could you help me? Thank you.
The default OMIfile is in the CCTM build directory. I cannot state why the ozone predictions did not change. Your run-script sets PHOTDIAG to “Y”. Please check how OZONE_COLUMN in the PHOTDIAG1 output file changes between using the two different OMIfiles.
Hi bhutzell,
I compared the OZONE_COLUMN in the PHOTDIAG1 file between the two files, they are different. Maybe updating the OMIfile doesn’t have much effect on the ozone prediction results in my simulation.
Thank you!