NUMATKN and SRFATKN variables in CMAQ cb6_ae7 species list

The BC/IC generation tool for CMAQ that I use for CMAQ also creates these six modal number and surface area density variables, also listed in CMAQ species list - but I am not sure if CMAQ benefits from these variables for its BCs or ICs:

    float NUMATKN(TSTEP, LAY, PERIM) ;
            NUMATKN:long_name = "NUMATKN         " ;
            NUMATKN:units = "#/m**3          " ;
            NUMATKN:var_desc = "VARIABLE NUMATKN ";

    float NUMACC(TSTEP, LAY, PERIM) ;
            NUMACC:long_name = "NUMACC          " ;
            NUMACC:units = "#/m**3          " ;
            NUMACC:var_desc = "VARIABLE NUMACC                                      " ;

    float NUMCOR(TSTEP, LAY, PERIM) ;
            NUMCOR:long_name = "NUMCOR          " ;
            NUMCOR:units = "#/m**3          " ;
            NUMCOR:var_desc = "VARIABLE NUMCOR                                               " ;

    float SRFATKN(TSTEP, LAY, PERIM) ;
            SRFATKN:long_name = "SRFATKN         " ;
            SRFATKN:units = "m**2/m**3       " ;
            SRFATKN:var_desc = "VARIABLE SRFATKN   " ;

    float SRFACC(TSTEP, LAY, PERIM) ;
            SRFACC:long_name = "SRFACC          " ;
            SRFACC:units = "m**2/m**3       " ;
            SRFACC:var_desc = "VARIABLE SRFACC                                           " ;

    float SRFCOR(TSTEP, LAY, PERIM) ;
            SRFCOR:long_name = "SRFCOR          " ;
            SRFCOR:units = "m**2/m**3       " ;
            SRFCOR:var_desc = "VARIABLE SRFCOR                               " ;

Yes, keep these species. CMAQ will benefit from having these, even if it determines that they do not combine with the total mass to yield an allowed size distribution, and thus overwrites them. In the near future we are planning to improve the documentation and user options surrounding IC and BC aerosol parameters and allow more options for CMAQ interprets them and potentially modifies them.