吉林省盛夏最强的一次雷暴大风天气分析  

Analysis of the Strongest Thunderstorm Gale of Jilin Province in Midsummer

作　　者：杨雪艳[1] 张梦远[1] 姚瑶[1] 张硕[1] 

机构地区：[1]吉林省气象台,吉林长春130062

出　　处：《安徽农业科学》2013年第25期10402-10404,10428,共4页Journal of Anhui Agricultural Sciences

摘　　要：利用高(低)空观测数据、多普勒雷达等相关资料,从天气背景、热力条件、水汽分布、能量场分布特征、不稳定度参数特征等方面,分析了2006年7月13日吉林省盛夏最强的一次雷暴大风天气过程的形成机制。结果表明,这次雷暴大风天气是由飑线造成的,低空增温、增湿与对流层中层干侵入的相互作用下使得对流风暴发展旺盛,下沉气流外流,导致地面出现强风;多普勒雷达提供的反射率因子及径向速度图能有效监测雷暴大风,反射率因子回波为带状或线状,在径向速度图上有大风区和中层径向速度辐合,风场上有明显的垂直切变,这些指标对大风预报有较好的指示意义。Using high,low altitude observation data,Doppler radar and other relevant information,the formation mechanism of the strongest thunderstorm gale on July 13th,2006 in Jilin Province was analyzed from aspects of weather background,thermal conditions,distribution of water vapor,energy field distribution characteristics and instability degree parameters.The results showed that this thunderstorm gale is caused by a squall line,the convective storm developed violently from the complex interplay of the low altitude temperature and humidity increased,the middle altitude dry air invaded,downdraft outflows,caused the ground appear strong winds.Doppler radar reflectivity and radial velocity map can effectively monitor the thunderstorm,reflectivity echo is zonal or linear shape,there is a strong wind area and middle radial velocity of convergence in the radial velocity map and the obvious vertical wind shear.All above indicators are a good indication of wind forecasting.

关 键 词：雷暴大风 雷达回波 天气分析 盛夏 吉林省 

分 类 号：S161.7[农业科学—农业气象学]