The Simulation of a Convective Cloud in a 3-D Model With Explicit Microphysics. Part I: Model Description and Sensitivity Experiments

摘要: Abstract A three-dimensional nonhydrostatic anelastic numerical model of a convective cloud with an explicit description microphysical processes has been developed. Two distribution functions are considered in the model—one for condensation nuclei (19 categories from 0.0076 to 7.6 microns) and another droplets raindrops (30 on logarithmic scale 4 3250 microns). The prognostic kinetic equations these enable calculation aerosol drop spectra starting activation culminating rain formation. warm studied include nucleation, condensation/evaporation, coalescence, breakup sedimentation. Analysis supersaturation evolution time shows that it does not experience growth onset coalescence correlates well values derived quasi-steady assumptions. Sensitivity tests accuracy calculations effect salt factor th...