Hi all, I’m performing a simulation for Southern California. As I was checking my SA outputs, I found my biogenic contributions to O3 over Los Angeles is very small (less than 1%), which seems a little strange. I checked my biogenic emissions and they were read correctly by the CMAQ. As I believe Los Angeles is in VOC-limited regime for O3 production, the biogenic emissions should have some contributions to O3. Currently I’m performing sensitivity tests using brute-force methods. Before I get those results, I have some questions:
Is there any way that I could know if a cell of my interest is VOC limited or NOx limited for O3 chemistry? For example, can I get a nc output telling the O3 production regime for all cells at different time? Or I could print the information in the log files.
Is CMAQ-ISAM able to track gridded area emission sources? My biogenic emission files are gridded area emissions.Only 4 out of my 9 sources have both gridded area emissions and inline point emissions. My results indicate that 3 sources have contributions to O3 larger than 1%, and those 3 sources are among those 4 sources, which makes me wonder if that’s a coincidence.