I’m still getting negative values for total sulfate.
Although, I didn’t analyze AERO process for only ASO4I, I think there may be also negative values in AERO process for ASO4I, because if aitken mode sulfate grows up to be accumulation or coarse mode sulfate particle, then aitken mode sulfate particle should be decreased.
When I posted issues of negative values for sulfate, I was not familiar with process analysis technique. And thanks to your reminder of the post.
Also, I discovered that heterogeneous N2O5 reaction affected the CHEM process of nitric acid in CMAQ version 5.3.1.
It means CHEM process includes HNO3 formation from heterogeneous N2O5 reaction.
In CMAQ version 5.4, Does the CHEM process of nitric acid include heterogeneous N2O5 reaction to form nitric acid??