【摘要】 为了研究中尺度城市对降水的影响,本文利用一个三维数值模式,对下垫面在气旋暴雨过程中的作用进行了数值模拟.较详细地研究了下垫面性质不均匀造成的边界层结构特征和局地环流.模式结果揭示出中尺度城市可引起不稳定层结、风场和垂直环流的变化,从而影响降水分布.更多还原

【Abstract】 In order to investigate the of city effects meso-scale on heavy rain, a three-dimensional model is used to simulate the effects of the underlying surfaces on the cyclnic precipitation process. The expri-ment howes that non-liomogeneous influence of underlying surface is exited in the local thermal and dynamical structure of the PBL and corresponding circulation. Therefore, the change of the instability stratification, wind and veryical circulation and the influence of rainfall location are analysed.更多还原