Fire emissions can be calculated online within CLM/CTSM.
Emissions calculated in CLM are matched to chemical species in CAM-Chem with a namelist that can be included in user_nl_cam ...
Emission factors are specified in a netcdf file - originally created by Maria Val Martin, updated by Fang Li. (These could be updated to the NEIVA database and match those in FINNv2.6 - please contact Louisa Emmons if you would like to help with this).