都市気象LESモデルを用いた豪雨の種となる熱的上昇流と渦管の組織化の解明

Abstract

It's studied how thermals, which cause guerrilla-heavy rainfall in future, are generated from urban area like Kobe City and break through atmospheric boundary layer (ABL). In particular, the phase that thermals and vortex tubes connect to genesis of cumulous and cumulonimbus. I think that aggregation may play an important role at the phase. But, by radar observation, this mechanism isn't clear yet. Hence it is better to compute by using urban meteorological large eddy simulation. In this study, I conducted idealized experiments in order to investigate on how the behavior of thermals and vortex tubes is around or above ABL.