I am curious what the difference between species SULF and SO2 is in SMOKE emissions files, since by default, in DESID, SULF from SMOKE maps to 0 as CMAQ gas species and maps fully to CMAQ fine aerosol species ASO4 while SO2 from SMOKE fully maps to CMAQ gas species SO2:
&EmissionScalingRules
EM_NML=
! Region | Stream Label |Emission | CMAQ- |Phase/|Scale |Basis |Op
! Label | |Surrogate| Species |Mode |Factor| |
! Default Gases
'EVERYWHERE', 'ALL' ,'SO2' ,'SO2' ,'GAS' ,1. ,'UNIT','a',
'EVERYWHERE', 'ALL' ,'SULF' ,'SULF' ,'GAS' ,0. ,'UNIT','a',
! Default Aerosols
'EVERYWHERE', 'ALL' ,'SULF' ,'ASO4' ,'FINE' ,1. ,'MASS','a',
When I do ‘ncdump’ of SMOKE emission files, I see the following description for SULF and SO2, and I couldn’t distinguish SULF from SO2:
float SULF(TSTEP, LAY, ROW, COL) ;
SULF:long_name = "SULF " ;
SULF:units = "moles/s " ;
SULF:var_desc = "Model species SULF " ;
float SO2(TSTEP, LAY, ROW, COL) ;
SO2:long_name = "SO2 " ;
SO2:units = "moles/s " ;
SO2:var_desc = "Model species SO2 " ;