MICROPHYSICAL CLOUD PROCESSES AND NUMERICAL ANALYSIS OF RAINFALL CONSIDERING THE EFFECTS OF AEROSOLS

Abstract

The authors proposed a numerical model of the precipitation considering cloud micro-physical processes and aerosols by improving the term related to condensation and evaporation of cloud water in the model proposed by Routledge and Hobbs (1983), and simulated the orographic rainfall considering the existence of aerosols. The maximum value of rainfall intensity at the ground surface becomes weaker with increase of the number concentration of aerosols. In order to compare the parameterization regarding cloud formation and the phenomena occurring actually in clouds, the authors have constructed the experimental facilities with quasi-prototype scale. In comparison with the results of prototype scale experiments conducted by the authers, the validity of our precipitation model is confirmed.