塔中一次雷暴降水天气过程边界层风场变化特征  

The Wind Character at Boundary Layer during A Thunderstorm in Tazhong,Xinjiang,China

作　　者：王柯[1,2] 何清[1] 王敏仲[1] 胡月宏 许文强 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所 [2]63655部队

出　　处：《中国沙漠》2013年第3期896-901,共6页Journal of Desert Research

基　　金：中国沙漠气象科学研究基金课题(sqj2009013);公益性行业科研专项项目(GYHY20100612);新疆气象局业务新技术项目(YX200912);国家自然科学基金项目(40775019);新疆气象局气象科技研究课题(C2008001);中央级公益性科研业务费项目(IDM201002)资助

摘　　要：雷达资料可以直观地显示雷暴降水过程随时间变化风场的垂直结构以及各高度层风向风速随时间变化特征,能较好地监测到低空急流以及降水粒子的垂直速度。利用风廓线雷达探测资料对2010年7月12日塔中一次雷暴降水过程中的边界层三维风场进行分析研究。结果表明:雷暴降水过程低层风速增大,高层风速减小;上空存在低空急流,平均风速达17.1m.s-1;雷暴时段,下沉气流垂直速度3.0m.s-1左右;降水时段,降水粒子平均下沉速度5.1m.s-1。The wind character at boundary layer during a thunderstorm on July 12, 2010 in Tazhong was given by using the wind profiler radar. Wind speed below the 3 000 m altitude increased significantly during the thunderstorm, and wind speed above 3 200 m altitude decreased during the precipitation period. There was a low level jet over the Tazhong in the altitude range of 900 m to 1 400 m during thunderstorms and the average wind speed was 17.1 m. s-1. A strong downdraft existed during the thunderstorm and the vertical velocity was approximately 3.0 m. s-1. During the precipitation the downdraft strengthened, the water droplet＇s average sinking speed was 5.1 m. s-1.

关 键 词：塔中 边界层 雷暴降水 风廓线雷达 风向 风速 

分 类 号：P425[天文地球—大气科学及气象学]