【摘要】 以2007-2008年湖北省暴雨过程为研究对象,按区域性暴雨过程的定义,通过分析地面雨量资料筛选出32次区域性暴雨过程。在对比分析多普勒天气雷达反射率因子回波形态、结构、暴雨落区以及主要影响天气系统的基础上,概括了湖北省区域性暴雨雷达回波模型。结果表明:典型区域性暴雨雷达回波形态有逗点状暴雨回波、涡旋状暴雨回波、涡带结合型暴雨回波和带状暴雨回波等4类,它们分别与锋面上中尺度气旋波扰动、川东低涡系统的发展、低涡发展与梅雨锋结合和气旋波上准静止锋面切变线的形成等紧密相关。更多还原

【Abstract】 Rainstorm processes in Hubei Province from years 2007 to 2008 are selected to study the characteristics of the radar echoes.First,thirty-two regional rainstorm processes are determined according to the rainfall data analysis.Then,by analyzing the Doppler radar reflectivity echo shapes,structures and so on, the four kinds of regional rainstorm radar echo models in Hubei Province are induced.Moreover,the rainstorm region and the major impact system’s synoptic characteristics of each kind of rainstorm echo are comparatively analyzed.The results show that,the four kinds of regional rainstorm radar echo models are the comma-shaped,the whirl-shaped,the complex vortex-belt shaped and the band-shaped,and they are closely related to the meso-orscale cyclone wave disturbance on the front surface,the development of the low vortex systems in eastern Sichuan Province,the combination of the Meiyu-front and the low vortex system,and the formation of quasi-stationary front shear line on the cyclone waves,etc.更多还原