中国西北部砂漠地域におけるプラネタリー境界層の観測

Abstract

As a part of the Sino-Japanese Co-operational Program on the Atmosphere-Land Surface Processes Experiment in the Heife River Basin (HEIFE), the planetary boundary layer was observed at the desert area in the northwest of China. From the results of this observation, the structure of the planetary boundary layer in the semiarid region was studied. Some interesting features were observed. At the sand desert, the latent heat flux from the ground reaches its maximum about two hours earlier than the sensible heat flux. The profile of specific humidity at the oasis has a large vertical gradient even in the mixed layer.And boundary layer warming process was also observed.