自由对流与稳定层结边界层风廓线的解析表达和边界层顶抽吸速度

The Expressions for the Wind Profiles of Free Convective and Stable Boundary Layers and the Pumping Velocity at the Top of the Planetary Boundary Layer

基于近年来对自由对流和稳定边界层湍流交换特征的研究,求解边界层运动方程,得到这两种层结下边界层风的解析表达式.所得廓线与边界层特性参数符合观测特征.还求出了这二种层结下边界层顶抽吸速度的解析表达及其与某些参数的关系.结果表明,抽吸速度与层结有关,其特征可从物理上加以解释.

Based on recent studies of the turbulent transfer in free convective and stable boundary lay -ers , analytic expressions for wind profiles in these two cases are obtained , the profiles and boundary layer parameters are in agreement with observational characteristics . Furthermore, the analytic expressions for the pumping velocity at the top of the PBL and their relations to some parameters are also derived . The results show that the pumping velocity is connected with stratification and may be explained physically.