&SPECIES_PARAMS
 PSPECIES="NH3",              ! Tracer name
 PWETA_GAS=9.85E-5,           ! Below-cloud scavenging (gases) - A (weta_gas) [Asman (1995)]
 PWETB_GAS=0.62,              ! Below-cloud scavenging (gases) - B (wetb_gas) [Asman (1995)]
 PRELDIFF=1.0,                ! Dry deposition (gases) - D [Wesely (1989)]
 PHENRY=5.9E+01,              ! Dry deposition (gases) - Henrys const. [henrys-law.org]
 PF0=0.0,                     ! Dry deposition (gases) - f0 (reactivity) [Wesely (1989)]
 PWEIGHTMOLAR=17.0,           ! molweight
 /
