灾害学2016，Vol.31Issue(2)：30-36,7.DOI:10.3969/j.issn.1000-811X.2016.02.007
引发暴雨的低涡发生发展机制分析
Mechanism of the Low Vortex’s Generation and Development Which Produces Heavy Rainfall
摘要
Abstract
Vortex rainstorm in the large range of middle east from May 25th,2013 to May 26th is analyzed by using the potential vorticity method and the results shows that:the quotation of the potential vorticity can trace the disturbance in the upper troposphere,the development of the system can be judged by the changes of disturbance potential vorticity which provides convenience for analyzing the disturbance in the upper troposphere.The abnor-mality of the potential vorticity in the upper troposphere makes the cyclonic vorticity be stronger and develop to the cyclonic vorticity column which makes Southwest Vortex move east and develop when it moves to the zenith of the Southwest Vortex,the Jiang-Huai Cyclone develops when the cyclonic circulation adds into the Stationary Front. The development of the Southwest Vortex and the generation of the cyclone intensifies low level convergence which produces strong rainfall,the strong rainfall locates in the front side of the moving direction of the negative center of MPV in the low-level,and the larger the negative value,the stronger the rainfall is.The latent heat of condensation released from the strong rainfall makes the potential vorticity and the cyclonic vorticity column increasing explosive-ly.关键词
低涡暴雨/位涡/扰动湿位涡/江淮气旋Key words
vortex rainstorm/potential vorticity/disturbance of moist potential vorticity/Jiang-Huai Cyclone分类
资源环境引用本文复制引用
崔恒立,赵宇,王东仙,谌伟,王培..引发暴雨的低涡发生发展机制分析[J].灾害学,2016,31(2):30-36,7.基金项目
国家自然科学基金项目（41475090，41475038）；江苏高校优势学科建设工程资助项目 （）
