大气科学学报2011，Vol.34Issue(6)：763-768,6.
盐城一次龙卷、短时强降水的地面中尺度分析和雷达回波特征
Ground and mesoscale analysis of a tornado and heavy rainfall and their radar echo characteristics in Yancheng
周宏伟 1王群 1夏文梅 2仓粟1
作者信息
- 1. 江苏省盐城市气象局,江苏盐城224005
- 2. 江苏省气象科学研究所,江苏南京210008
- 折叠
摘要
Abstract
The tornado,short-term heavy precipitation and other convective weather in Yancheng City on 3 July 2006 are analyzed based on the data of dense surface automatic meteorological stations and Doppler weather radar.Results show that the weather background of the convective weather is Changjiang-Huaihe storm weather situation of the Meiyu,including the westerly trough eastward in upper levels,southwest jet stream in low-mid levels and strong convective instability.The development and maintenance of surface mesoscale vortex cause a continued strong upward motion for the convective weather.The tornado occurs in the large reflectivity gradient region in low-mid levels of the non-supercell storm,with a marked small scale vortex feature in the average radial velocity.In addition,three tropical systems in the western Pacific subtropical high and the ITCZ provide abundant moisture for the short-term heavy rainfall.There is a close relationship between the short-term heavy rainfall （occuring in a period of the increasing to the strongest,and to the beginning of decrease for the jet stream in low-mid levels） and the strong echo area larger than 50 dBZ.关键词
短时特大暴雨/龙卷/中尺度涡旋Key words
short-term heavy rain/tornado/mesoscale vortex分类
天文与地球科学引用本文复制引用
周宏伟,王群,夏文梅,仓粟..盐城一次龙卷、短时强降水的地面中尺度分析和雷达回波特征[J].大气科学学报,2011,34(6):763-768,6.
