摘要
应用新一代天气雷达资料对一次影响闽北的雹云回波特征进行分析、总结,结果表明该次降雹属于南支槽型中的低空切变降雹。500 h Pa中高纬地区的一槽一脊型和西太平洋副热带高压的稳定维持为该次降雹过程提供有利的环流背景。低层有逆温层,层结曲线与露点曲线之间呈向上开口喇叭状的下湿上干配置有利于产生冰雹等强对流天气。雹云A是影响闽北最强的一块雹云回波,具有回波强度强、强回波区面积大、维持时间长、并出现"三体散射"现象、逐体扫垂直积分液态水含量(VIL)"跃增"及速度"逆风区"等特征。
The new generation of weather radar data was applied to ana- lyze and summarize the hail cloud echo characteristics in north Fujian, the re- suits showed that this hail was low-ahi- tude shear hail of the south branch trough. One trough and one ridge in the 500 hPa middle- and high-altitude re- gions, and stable maintenance of western Pacific subtropical anticyclone provided a favorable circulation background for this hailing process. Inversion layer in the low level, the upward trumpet- shaped upper wetness and lower dryness between stratification curve and dew- point curve contributed to the severe convection weather such as hail. Hail cloud A was the strongest hail cloud e- cho that influenced the north Fujian, characterized by strong echo intensity, huge strong echo area, long duration, phenomenon of ＂three-body scattering＂, VIL ＂jumping＂ and so on.
出处
《农业灾害研究》
2015年第3期40-43,共4页
Journal of Agricultural Catastrophology
关键词
冰雹
强对流天气
雷达回波
Hail
Severe convectionweather
Radar echo
