Abstract
The spatial structures of atmospheric mixed and transition layers were investigated using the image data of aerosol distribution observed by a scanning Mie lidar. The mixed layer height, the transition layer thickness and the horizontal scale of convective cell structures in the transition layer as well as their time variation were analyzed. The main results are : the mixed layer height reaches its maximum at about 13h and its rising speed is 100-300m/h in the period of 8-12h. The transition layer thickness increases in the morning and takes a constant value thereafter. The aspect ratio of the convective cell structure is estimated about 2-4 in the early morning and reaches about unity as the mixed layer develops.
