I’m asking here how to use MEGAN biogenic emissions in CMAQ. I know that EPA has used before (see https://www3.epa.gov/ttnchie1/conference/ei18/session3/pouliot.pdf). But they didn’t mention how they used MEGAN in the model. So I wonder how people deal with MEGAN emissions. From my understanding, I would combine MEGAN emissions into the surface emission file and set CTM_BIOGEMIS to N. If anyone has worked with MEGAN, could you share your thoughts? I’m looking for some better way to apply MEGAN in CMAQ.