北京地区雷暴大风不同生命期内的雷达统计特征及预警提前量分析  

Radar Statistical Characteristics and Warning Lead Analysis of Thunderstorm Gales in Different Life Periods in Beijing

作　　者：杨璐 陈明轩[1] 孟金平[2] 陈学玲 王子静 赵晨 YANG Lu;CHEN Mingxuan;MENG Jinping;CHEN Xueling;WANG Zijing;ZHAO Chen(Institute of Urban Meteorology, CMA, Beijing 100089;Beijing Meteorological Service, Beijing 100089;Daxing Meteorological Office of Beijing, Beijing 102600)

机构地区：[1]中国气象局北京城市气象研究所,北京100089 [2]北京市气象局,北京100089 [3]北京市大兴区气象局,北京102600

出　　处：《气象》2018年第6期802-813,共12页Meteorological Monthly

基　　金：国家自然科学青年基金项目(41705091);北京自然科学青年基金项目(8164056);中央级公益性科研院所基本科研业务费专项基金(IUMKY201706)共同资助

摘　　要：选取2010—2014年发生在北京地区的19个致灾的雷暴大风天气过程,应用北京新一代多普勒天气雷达体扫资料的反射率因子和径向速度产品,分析了雷暴大风天气不同生命期内的雷达回波特征。分析发现依据径向速度大值区能对77.8%的带状回波造成的雷暴大风天气提前发布预警,能对100%的弓形回波造成的雷暴大风天气提前发布预警,而其中有67%可提前30min发布预警;孤立的块状回波前侧均未观测到阵风锋回波,径向速度图未观测到入流急流,径向速度大值区不明显。但径向速度图上观测到的中层径向辐合、入流急流、中气旋及反射率图上观测到的阵风锋都为雷暴大风的提前预警提供了重要指示特征。Using Beijing CINRAD-SA Radar refleetivity and radial velocity products about 19 cases of thun- derstorm from 2010 to 2014, radar echo characteristics of thunderstorm gales in different life periods in Beijing are analyzed. It is found that 77.8%and 100% thunderstorm gales caused by the belt-shaped and bow radar echo can be respectively forcasted and warned early, and 67% of them can be issued early warn- ing in 30 min lead time. No gust front echo was observed in the front of the isolated block echo, the inflow jet was not seen in the radial velocity map, and the radial velocity was not obvious. However, the middle radial convergence, the inflow jet and the gust front observed on the radial velocity map provide important indicative features for the early warning of thunderstorm gale.

关 键 词：雷暴大风 雷达回波特征 预警提前量 

分 类 号：P446[天文地球—大气科学及气象学]