气象与环境学报2012，Vol.28Issue(4)：49-54,6.
2010年8月丹东连续两次副热带高压暴雨多普勒雷达回波对比分析
Comparative analysis of two heavy rains caused by subtropical high in August 2010 based on Doppler radar data in Dandong
摘要
Abstract
Based on the basic reflectivity,basic radial velocity and wind profile data from Doppler radar,two heavy rain processes in Dandong area on August 19 and 20,2010 were analyzed,and their weather situations and radar echo characteristics were discussed.The results indicate that the forces of southward cold air and warm wet air of the rear subtropical high are compatible when Dandong is located within subtropical high or near the margin,so it comes into being a typical heavy rain model in Dandong.The VWP(vertical wind profile) has a water vapor accumulation process during the prophase of precipitation,and it shows that upper level jet stream appears and upper momentum transports downward during the short-time heavy rain of two processes.The downward transportation of upper momentum makes lower level jet stream strengthened and the lower level converges,so rain intensity increases obviously.An echo strip with 40 dBz is formed in the precipitation echo areas of two processes,and the echo moving direction is consistent with the echo axial direction,which makes precipitation time prolonged and rainfall intensity increased.The occurrence time of inverse wind area is corresponding with that of the short-time strong rainfall.The corresponding relationship between the location of inverse wind area and strong echo area suggests that the larger the thickness of inverse wind area is,the stronger the corresponding reflectivity factor is,and so rainfall intensity is also strong.关键词
副热带高压/暴雨/风廓线/逆风区Key words
Subtropical high/Rainstorm/Wind profile/Inverse wind area分类
天文与地球科学引用本文复制引用
徐璐璐,李慧琳,孙连强,李倩..2010年8月丹东连续两次副热带高压暴雨多普勒雷达回波对比分析[J].气象与环境学报,2012,28(4):49-54,6.基金项目
中国气象局公益性行业（气象）科研专项（GYHY200906011）资助 （）
