地面辐合线触发黔西南州大暴雨成因分析
Cause Analysis of the Heavy Rains Triggered by Ground Convergence Line in Qianxinan Prefecture
崔庭 1孙旭东 2吴静 2杨杰 1柏宾1
作者信息
- 1. 贵州省望谟县气象局,贵州望谟552300
- 2. 黔西南州气象局,贵州兴义562400
- 折叠
摘要
利用高空观测资料、地面自动站观测资料、NCEP 1.0°×1.0°再分析资料、FY-2C资料等,从天气系统、物理量场、卫星云图等方面对2014年8月23日黔西南州的这次强降雨天气过程进行诊断分析.结果表明,中低层切变和冷空气是此次暴雨天气的主要影响系统,地面辐合线触发了暴雨天气的发生发展;中尺度对流云团沿地面辐合线生成与发展,对流云团合并增强是直接造成黔西南州大暴雨的主要原因;850 hPa水汽通量散度辐合中心沿着地面辐合线自北向南移动影响黔西南州,且降雨落区与水汽通量和水汽通量辐合中心相对应.
Abstract
Using high altitude observation data,ground automatic observation data,NCEP 1.0 × 1.0reanalysis data,FY-2C data,the heavy rain process on Aug.23,2014 in Qianxinan Prefecture was analyzed from aspects of weather system,physical quantity field,satellite cloud.The results showed that low level shear and cold air were main influencing system,surface convergence line triggered the occurrence and development of the heavy rain;mesoscale convective clouds generated and developed along surface convergence line;850 hPa water vapor flux divergence center moved along surface convergence line from north to south,the rainfall zone was corresponding to the water vapor and convergence center.
关键词
大暴雨/地面辐合线/天气系统/物理量场/卫星云图/黔西南州Key words
Heavy rains/Ground convergence line/Weather system/Physical quantity field/Satellite cloud/Qianxinan Prefecture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