摘要
使用2009-2011年天气系统资料和多普勒雷达资料,分析了四种层结条件下萍乡地区的夏季对流云回波特征,结果表明:水汽分布对云体结构有影响,受暖湿平流作用时,大气水汽充分,云体发展旺盛,回波主体半数在0℃附近,对流云可向上延展至过冷却层,有利于混合云降水发生。多普勒雷达的径向速度可以判断对流云的发展阶段,对人影作业的时机把握具有指示意义。
Using the weather system data and Doppler radar data from 2009 to 2011, the characteristics of summer convective cloud echo in Pingxiang area under four stratification conditions are analyzed in this paper, and the results show that the distribution of water vapor has an effect on the cloud structure. Under the action of warm and wet advection, the atmospheric water vapor is sufficient and the cloud is developing vigorously. Half of the echo body is around 0 ℃, and the convective cloud can extend upward to the supercooling layer, which is beneficial to the occurrence of mixed cloud precipitation. The radial velocity of Doppler radar can be used to judge the developing stage of convective cloud, and it is instructive to grasp the time of human shadow operation.
作者
戴晶晶
叶小峰
张钦
李娜
DAI Jingjing;YE Xiaofeng;ZHANG Qin;LI Na(Pingxiang Meteorological Bureau, 337002, Pingxiang, Jiangxi, PRC)
出处
《江西科学》
2019年第3期341-349,共9页
Jiangxi Science
基金
江西省气象科技项目“萍乡市对流云物理特征分析与人影作业技术研究”
关键词
对流云
多普勒雷达
人影
convective cloud
Doppler radar
shadow
