安徽农业科学2012，Vol.40Issue(9)：5567-5570,4.
中卫“7.28”区域性暴雨成因分析
Analysis on Formation Reason of “7.28” Regional Rainstorm in Zhongwei
白玲 1聂晶鑫 2李保华 1张德有 1杨苑1
作者信息
- 1. 宁夏中卫市气象局,宁夏中卫755000
- 2. 宁夏气象台,宁夏银川750002
- 折叠
摘要
Abstract
[Objective] The research aimed to analyze formation reason of "7.28" regional rainstorm in Zhongwei City. [Method] NCEP/ NCAR reanalysis data and Micaps routine data were used to analyze cause of the regional rainstorm which occurred in Zhongwei City on July 28, 2011. [Result] Under the east-high-west-low circulation situation, factors which caused this rainstorm included westerly jet at 200 hPa, cold trough at 500 hPa, low vortex and shear line at 700 hPa, quick alternation of the warm and cold air at 850 hPa, stability and northward moving of the subtropical high. Falling zone of the rainstorm was located at the right of the upper jet, the left of the low-level jet and the south of 700 hPa shear line. Analyses of each physical quantity field showed that distribution of the moisture condition, vertical motion, energy, vor-ticity, divergence and wind field over the rainstorm area were all beneficial for rainstorm generation. When the rainstorm occurred, radar echo was mixed-cloud precipitation type. The echo intensity was from 30 to 45dBz, and top height of the echo was from 7 to 8 km. [Conclusion] The research provided some experience and theoretical guidance for future rainstorm forecast in Zhongwei City.关键词
区域性暴雨/影响系统/诊断分析/雷达回波Key words
Regional rainstorm/ Influence system/ Diagnostic analysis/ Radar echo分类
农业科技引用本文复制引用
白玲,聂晶鑫,李保华,张德有,杨苑..中卫“7.28”区域性暴雨成因分析[J].安徽农业科学,2012,40(9):5567-5570,4.
