The effects of deep convection on the concentration and size distribution of aerosol particles within the upper troposphere: A case study

摘要: [1] A cloud resolving model coupled with a spectral bin microphysical scheme was used to investigate the effects of deep convection on concentration and size distribution aerosol particles within upper troposphere. A convective storm that occurred 1 December, 2005 in Darwin, Australia simulated, compared available radar observations. The results showed echo developing stage well reproduced by model. Sensitivity tests for layers at different altitudes were conducted order understand how troposphere can be influenced vertical transport aerosols as result convection. indicated originating from boundary layer more efficiently transported upward, those mid-troposphere, due significantly increased velocity through reinforced homogeneous freezing droplets. Precipitation when lofted altitudes, except case where an appeared 5.4–8.0 km, which relatively efficient heterogeneous ice nucleation subsequent Wegener-Bergeron-Findeisen process resulted pronounced production crystals, prohibited formation graupel via accretion. revealed, least cases considered, factor 7.71, 5.36, 5.16, respectively, enhanced existed 0–2.2 2.2–5.4 Aitken mode portion accumulation (0.1–0.2μm) being most susceptible upward transport.