【摘要】 利用安徽省内多普勒雷达组网数据,统计分析了江淮地区2013—2014年6—9月发生的对流云结构特征,共找出227个对流云个例,将不同对流云按结构分为9类,归类后发现江淮对流云以孤立对流、簇状对流和非线性对流为主,分别占总对流数的29.1%、18.1%和23.3%。不同的天气背景条件下,主要发生的对流结构也不同,低槽Ⅰ型天气下,主要以孤立对流云为主;低槽Ⅱ型天气下,主要发生的对流以非线状对流为主,同时由于低槽Ⅱ型是江淮地区多发的天气类型,所以这种天气是各种对流的高发型天气。利用调频连续波雷达探测获得高时空分辨率云体时间-高度剖面,了解云体的垂直结构,给出比一般雷达产品更加精细的对流云个例显示,典型孤立对流云、簇状对流云和非线状对流云的个例剖面图,及相应水粒子最大下落速度分别为13.3、8.2和11.5 m·s^-1。更多还原

【Abstract】 This paper analyzed structure characteristics of convective clouds over the area between the Yangtze River and the Huaihe River based on Doppler radar data during 2013 — 2014.The used 227 convective cloud cases are classified into nine structure types.Then,we found that the isolated cell（IC）,clusters of cells（CC）,nonlinear systems（NL） are the dominant convective clouds over this area,accounting for 29.1%,18.1%,and 23.3%of the total respectively.Different structural convective clouds occur under different weather backgrounds.Isolated cell is the main convection in the trough I pattern;nonlinear system is the major convection in the trough II pattern.At the same time,other structural convective clouds also occur frequently due to the common synoptic conditions.The convective clouds detected by the C-FMCW radar show higher resolution of IC,CC and NL cloud structure images and the maximum falling speeds of precipitation particles,reaching 13.3 m· s^-1,8.2 m · s^-1 and 11.5 m · s^-1,respectively.更多还原