I’m trying to interface the new SOA model in CAMx and CMAQ.
When I compare the SOA conc. from the new SOA model with the SOA conc. from the pre-existing SOA model (SOAP2.2 in CAMx),
The minimum SOA concentrations are very different.
The pre-existing SOA model showed at least 0.13 micrograms/m3 of total SOA, but my SOA model showed ‘zero’ conc. sometimes (especially in very little emission area).
This new model is based on chamber simulations, and I want to use it in the regional scale simulations.
Is there some part of skills or tuning to calculate the minimum concentration in the SOA model code?
Should I consider some kind of lower boundary to avoid the ‘zero’ concentration?
Many thanks in advance!