【摘要】 对2013年4月17日和2015年5月10日贵州省黔东南地区两次雷暴大风天气过程的物理环境场和多普勒雷达回波特征进行对比分析,表明雷暴大风的发生需要一定的环境条件,抬升指数LI、下沉对流有效位能DCAPE、总指数TT、深对流指数DCI等对黔东南雷暴大风有较好的指示意义。通过对多普勒雷达回波产品的分析,表明这两次雷暴大风均为典型的下击暴流,雷暴单体反射率因子核的突然升高和持续下降可用于短时临近预报。更多还原

【Abstract】 The ambient circulation and convection parameters of the two thunderstorm wind events were analyzed by using the data from automatic weather station and sounding data. It shows that the occurrence of thunderstorm winds needs certain environmental conditions. Lifted index( LI),down draft convective available potential energy( DCAPE),deep convective index( DCI) etc. are important to the potential development of the thunderstorm wind in Qiandongnan. The Doppler weather radar data show that the suddenly rise and continuous decline of the radar echo reflectivity nucleus can be used for short-term forecasting of thunderstorm winds in Qiandongnan.更多还原