陕西中南部一次持续性暴雨天气过程分析
Process Analysis of a Persistent Rainstorm in Central South Shaanxi Province
李晓利 1郑荣玉 2严珠琴 3康磊1
作者信息
- 1. 陕西省榆林市气象台,陕西榆林719000
- 2. 福建省三明市气象局,福建三明365000
- 3. 安徽省枞阳县气象局,安徽安庆246701
- 折叠
摘要
利用常规观测资料,紧密结合暴雨发生的物理条件,从环流形势、影响系统、物理量场等方面,对2011年9月16～19日陕西中南部发生的一次持续性暴雨天气的发生机制、过程特征进行初步诊断分析.结果表明,这次暴雨过程发生在深厚的上升气流中,有明显的水汽通量辐合和水汽通量输送,高低空急流的长时间维持、对流层低层“人”字型切变的存在以及地面冷锋移动缓慢造成暴雨天气的持续;θse的锋区位置与强降水的出现具有很好的对应关系,θse锋区的南压对于强降水的预报具有一定指示意义.
Abstract
Conventional observation data were used to closely integrate the physical conditions of rainstorm.The pathogenetic mechanism and process features of a persistent rainstorm were preliminarily analyzed in central south Shaanxi Province from September 16 to 19,2011 from the aspects of circulation pattern,influencing system and physical quantity field.Results showed that this rainstorm process happened in the deep updraft with significant water vapour flux convergence and water vapour flux transfer,long-term maintain of high-and low-level jet,and slow move of ground cold front,which all led to the persistency of rainstorm weather.θse frontal position had relatively good corresponding relation with the appearance of heavy precipitation.θse front southward showed certain guiding significance to the forecast of heavy precipitation.
关键词
持续性暴雨/环流形势/影响系统/物理量场Key words
Persistent rainstorm/Circulation pattern/Influencing system/Physical quantity field引用本文复制引用
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据