晴空日中尺度切变环境场与对流云团发展条件

On Mesoscale Shear Environment Field in Cloudless Sky and Development Conditions of Convective Cloud Cluster

重点应用雷达回波资料结合常规气象资料、卫星云图 ,综合分析了 50 0hPa中尺度切变与陕北南部地区对流阵性降水形成、发展条件 ,指出了 50 0hPa不同的中尺度切变与有利的环境合理配置 ,是导致对流云团发展的重要因素 ,不同特征环境风切变配置与对流单体的发展趋势、强度变化、移动和合并息息相关。

By the use of routine meteorological data, cloud images and radar echo, the mesoscale shear of 500hPa altitude and the forming and development conditions of convective precipitation are analyzed. It suggests that the allocation of mesoscale shear of 500hPa altitude and positive environment filed results in the development of convective cloud cluster and that different environment wind shear allocation is closely related to the developing, strengthening, moving and merging convective cell.