西南涡影响下四川盆地暴雨的FY静止卫星资料探究
Study on FY Geostationary Satellite Data of Rainstorm in Sichuan Basin under the Influence of Southwest Vortex

本文基于FY静止气象卫星资料，分析西南涡影响下四川盆地西南部眉山市暴雨天气过程，得到以下结论：(1) 不同初始位置的云团位于不同的西南涡移动路径中，可结合云团初始位置判断西南涡移动路径。(2) 云团合并后影响盆地西南部占比达到59%，且合并云团均为大云团吞并小云团；单独影响盆地西南部的初始对流云团面积都较小，然后不断发展扩大。(3) 九龙涡和盆地涡影响盆地西南部的区域暴雨天气过程中，可根据西南涡不同路径影响时强降雨时段的云团分类和对应的云顶亮温，判断小时雨强，作为西南涡不同移动路径影响盆地西南部时的FY静止卫星短临预报指标。
Based on the data of FY stationary meteorological satellite, this paper analyzes the rainstorm weather process in Meishan City, Southwest Sichuan basin under the influence of southwest vortex, and draws the following conclusions: (1) Cloud clusters with different initial locations are located in different moving paths of the southwest vortex, and the moving paths of the southwest vortex can be determined based on the initial locations of the cloud clusters. (2) 59% of the merged clouds affected Southwest basin, and all the merged clouds were large clouds annexing small clouds; The area of convective clouds affecting the southwestern part of the basin alone was initially small, and then gradually expanded. (3) During the regional rainstorm weather process of the southwest of the basin affected by the Kowloon Vortex and the basin vortex, the hourly rain intensity can be judged according to the cloud group classification and the corresponding cloud top brightness temperature during the heavy rainfall period when the southwest vortex is affected by different paths, which can be used as the short-term forecast index of FY stationary satellite when the southwest vortex is affected by different moving paths.