Dear RegCM users,

i have a question regarding the DCCB chemistry option in the 4.6.0 version:

The user guide days (Page 35):

"DCCB : Activate CBMZ +DUST +CARB + sulfate-nitrate-ammonium aerosol calculated with the

ISORROPIA gas-aerosol thermodynamical scheme: 50 tracers are considered here."

When I look at the code in mod_che_common, I find:

ntr = 50

which is ok, but when looking at the species list, I cannot find sulfates (like ANO3 and ANH4 that stands for nitrates and ammonium).

chtrname(1:ntr)(1:6) = (/'NO    ','NO2   ','N2O5 ','HNO2 ',&
                              'HNO3 ','HNO4 ','O3    ','H2O2 ',&
                              'CO    ','SO2   ','DMS   ','H2SO4 ',&
                              'CH4   ','C2H6 ','PAR   ','CH3OH ',&
                              'HCHO ','ALD2 ','AONE ','ETH   ',&
                              'OLET ','OLEI ','TOL   ','XYL   ',&
                              'ISOP ','ONIT ','PAN   ','HCOOH ',&
                              'RCOOH ','CH3OOH','ETHOOH','ROOH ',&
                              'MGLY ','ISOPRD','ISOPN ','OPEN ',&
                              'CRES ','NH3   ','DUST01','DUST02',&
                              'DUST03','DUST04','BC_HL ','BC_HB ',&
                              'OC_HL ','OC_HB ','SSLT01','SSLT02',&
                              'ANO3 ','ANH4 ' /)

Can somebody explain me, why it is so?

Thanks a lot in advance

With regards,

Peter