气象Issue(5)：628-636,9.DOI:10.7519/j.issn.1000-0526.2014.05.014
一次龙卷风天气的特征分析
Characteristics Analysis of Tornado Weather
摘要
Abstract
Using Puyang CINRDA/SB Doppler radar detection data,conventional data,intensive operation-al data,this paper analyzed a tornado process that occurred in Puyang on 16 July 2009.The diagnostic re-sults show that the tornado occurs in the northwest of subtropical high edge,the left front of low-level jet and near the warm shear line.Before the tornado there are powerful convective instability energy in atmos-pheric environment,and large wind vertical shear and abundant water vapor in lower levels.In the Doppler radar reflectivity factor chart,the north of mobile bow echo is strongly developed into hooked echo,and the tornado is detected near the weak-echo area.Radial velocity diagram shows there is a meso-γscale cy-clonic vortex field with convergence.The strengthened vortex leads to the central tornado vortex,produ-cing the tornado weather.In addition,the strong echo,low echo top high,lower strong vertical wind shear are all the characteristics of Doppler radar products.关键词
龙卷风/暖切变线/钩状回波/龙卷涡旋特征/强垂直风切变Key words
tornado/warm shear line/hooked echo/tornado vortex signature/strong vertical wind shear分类
天文与地球科学引用本文复制引用
李改琴,许庆娥,吴丽敏,董建设,钟天华..一次龙卷风天气的特征分析[J].气象,2014,(5):628-636,9.基金项目
河南省气象局“河南致灾强风暴中分析模型和邻近预警技术方法研究”资助 （）
