2015年7月20—22日暴雨天气多普勒天气雷达产品诊断分析  

Diagnostic Analysis of Doppler Radar Products of Rainstorm Weather during July 20-22,2015

作　　者：姜陈威 谢俊鹏 黄铭绸 沈小安 

机构地区：[1]福建省东山县气象局,福建漳州363401

出　　处：《农业灾害研究》2017年第3期20-21,共2页Journal of Agricultural Catastrophology

摘　　要：利用常规资料、自动站观测资料及多普勒天气雷达产品,对2015年7月20—22日东山县暴雨天气过程诊断分析。结果表明,暴雨期间,东山县处在南亚高压中心周边一带,高空气流为反气旋式分散形势,高空辐散形成抽吸作用,推动暴雨天气发生。雷达回波呈逆时针旋转的螺旋状回波结构及对流性降水回波特征,雷达速度图上分布显著逆风区,说明暴雨落区有强烈垂直环流发展,有利于暴雨天气发生。Based on the conventional data, automatic station observation data and Doppler weather radar products, a rainstorm occurred in Dongshan County during July 20-22, 2015 was analyzed. The results showed that Dongshan was in the surrounding area of the South Asia high-pressure center during the rain- storm. The upper divergence pumping action had a positive effect on the forma- tion of rainstorm weather. The Radar echo had spiral echo structure with counterclockwise direction and the char- acteristics of convective precipitation echo. The strong vertical circulation of the heavy rain area was beneficial to the formation of rainstorm weather.

关 键 词：暴雨天气 天气背景 发射率因子 径向速度 

分 类 号：P458.121.1[天文地球—大气科学及气象学]