62017-03-24 , 法政大学大学院デザイン工学研究科
This study conducted experimental simulations of cloud seeding on torrential rains with the forced-cooling and artificial-nucleus technique in order to examine the mitigation effect and acceleration risk on precipitation. Some severe rainfall events including linear convective systems weresimulated using a mesoscale meteorological model. Results of this study clarified that relatively small-scale cloud seeding as the discrete or dynamic seeding can produce some mitigation effects on precipitation. In comparison of the mitigating mechanism of both techniques, vertical updraft and graupel generation in the upper air was noticeably weakened by both techniques in the peak stage of rainfall.