積雲の雲底下における大気の性状について

Abstract

Observational studies on convective motions in the planetary boundary layer under cumulusclouds are made by the use of acoustic sounder (Sodar) developed by the authors. In the case ofsmall developing cumulus cloud, updraft area topped with cumulus proceeds the cloud in the boundarylayer. However, marure cumulus cloud has updraft area, delaying with descending height, whichcenters the horizontal circulation. In the strato-cumulus case, cloud has no correlation with con-vective action in the boundary layer.