occurs in atmosphere atmospheric secondary aerosol formation process envoAtmo formation of an aerosol in the atmosphere A process during which gas-phase molecules form solid or liquid particles that are stable enough to continue growing in size - via the condensation or aggregation of other gas-phase molecules - at a greater rate than their constituents re-enter gas phase. formation of particles from gaseous material in an atmosphere atmospheric formation of an aerosol formation of an aerosol in an atmosphere formation of liquid or solid particles from gaseous material in an atmosphere secondary aerosol formation process atmospheric process