&SPECIES_PARAMS
 PSPECIES="G-HCH",            ! Tracer name
 PDECAY=-9.9,                 ! Species half life
 PWETA_GAS=3.5E-05,           ! Below-cloud scavenging (gases) - A (weta_gas)
 PWETB_GAS=0.62,              ! Below-cloud scavenging (gases) - B (wetb_gas)
 PCRAIN_AERO=-9.9,            ! Below-cloud scavenging (particles) - Crain (crain_aero)
 PCSNOW_AERO=-9.9,            ! Below-cloud scavenging (particles) - Csnow (csnow_aero)
 PCCN_AERO=-9.9,              ! In-cloud scavenging (particles) - CCNeff (ccn_aero)
 PIN_AERO=-9.9,               ! In-cloud scavenging (particles) - INeff (in_aero)
 PDENSITY=-0.9E+9,            ! Dry deposition (particles) - rho
 PDQUER=0.0,                  ! Dry deposition (particles) - dquer
 PDSIGMA=0.0,                 ! Dry deposition (particles) - dsig
 PDRYVEL=-9.99,               ! Alternative: dry deposition velocity
 PRELDIFF=4.3,                ! Dry deposition (gases) - D
 PHENRY=422.0,                ! Dry deposition (gases) - Henrys const.
 PF0=0.1,                     ! Dry deposition (gases) - f0 (reactivity)
 PWEIGHTMOLAR=290.83,         ! molweight
 POHCCONST=6.21E-11,          ! OH Reaction rate - C [cm^3/molecule/sec]
 POHDCONST=1203.0,            ! OH Reaction rate - D [K]
 POHNCONST=2.00,              ! OH Reaction rate - N (no unit)
 /