Hi Christian,
The CMAQ/ISAM model demonstrated satisfactory performance following my assessment of PVO3, where I employed a single, non-region-specific tag, as per your suggestion. Subsequently, I integrated this into my control file to evaluate the contribution of PVO from O3_OTH. However, I have observed a significant discrepancy in O3_PVO levels between the test run (case1) and the full version run (case2), as illustrated in the attached screenshot. This discrepancy has prompted me to question our approach to handling PVO.
Thanks.
