強制上昇流が局地降雨に与える影響に関する考察

Abstract

Cloud development is studied numerically in a deep, two-dimensional cloud model with detailed microphysics to examine effect of an updraft caused by topography on the cumulus cloud.It is found that the initial updraft makes much of steam of cumulus on the developing stage to condense, and it changes much latent heat to sensible heat through condensation process.The stronger initial updraft causes neither stronger nor more amount of rainfall, and it also does not make the cumulus cloud life longer.The strength and the amount of a rainfall is depended on the amount of cloud droplet produced.Finally, it is found that updraft has an effect on cumulus not dynamically but thermodynamically.