Hi everyone,
I’m currently working on process analysis in CMAQ v5.5.3, specifically analyzing nitrate formation using the IPR module. During my calculations, I observed that the EMIS-ANO3 (contribution of emissions to nitrate concentration) seems disproportionately high, especially considering that nitrate is predominantly formed through secondary processes.
For reference, I’m conducting the simulation for a site in Beijing (layer 1), and my calculation setup is as follows:
DEFINE FAMILY ANO3 = ANO3J + ANO3I;
IPR_OUTPUT ANO3 = EMIS+HADV+HDIF+VDIF+ZADV+DDEP+AERO+CHEM+CLDS;
I’m concerned that the EMIS_ANO3 contribution is overestimated compared to the literature. Has anyone experienced similar issues with this version of CMAQ, or could there be something wrong with my setup?
I would appreciate any feedback or guidance on resolving this discrepancy.
Thank you for your help!
Best regards,
Zhenze Liu