2016年7月26日抚顺短时大暴雨的中尺度特征分析  

Analysis on Mesoscale Characteristics of Short-time Heavy Rain in Fushun on July 26,2016

作　　者：全美兰 葛权哲 马晓晨[2] 沈斌 李俊乐 李若楠 郑国伟 刘多文 李炳昆 QUAN Mei-lan(Fushun Meteo­rological Bureau in Liaoning Province,Fushun,Liaoning 113006)

机构地区：[1]辽宁省抚顺市气象局,辽宁抚顺113006 [2]辽宁省防雷技术服务中心,辽宁沈阳110166

出　　处：《农业灾害研究》2019年第6期85-87,共3页Journal of Agricultural Catastrophology

摘　　要：利用FY-2E卫星红外辐射亮度温度资料、加密自动站资料、NECP再分析资料和常规观测资料对2016年7月26日发生在抚顺西北部的一次短时大暴雨过程的中尺度特征进行分析。结果表明,在有利的天气尺度背景形势下,地面中尺度辐合线加强,及其东侧形成东北风、偏北风和偏南风3股气流的辐合中心,造成了抚顺西北部的强降水。中尺度特征在云图TBB资料显示,强降水开始发生在中尺度对流云团发展东移时,最强降水出现在TBB梯度的大值区,强降水随着TBB梯度区移动,抚顺市区短时大暴雨与TBB梯度大值区在抚顺西北部上空滞留有关。分析中还发现,低空急流、强的风速辐合的位置及700 h Pa到500 h Pa的明显前倾结构,对此次强降水提供了有利的条件。Using FY-2 E satellite infrared brightness temperature data,automatic station data,NECP reanalysis data and conventional observation data,the mesoscale characteristics of a short-term heavy rain on July 26,2016 in the northwest of Fushun were analyzed. The results showed that under favorable weather scale background,the convergence line of surface mesoscale was strengthened,and the convergence center of northeast wind,northerly wind and southerly wind was formed in the East,which resulted in heavy rainfall in the northwest of Fushun. The mesoscale characteristics of TBB data showed that the strong precipitation began to occur when the mesoscale convective cloud cluster developed eastward,and the strongest precipitation appeared in the large value area of TBB gradient. The strong precipitation moved with the TBB gradient area,and the short-term heavy rain in Fushun City was related to the large value area of TBB gradient staying in the northwest of Fushun.It was also found that the low level jet,the strong convergence of the wind speed and the obvious forward structure of 700 h Pa to500 h Pa provided favorable conditions for the heavy rainfall.

关 键 词：抚顺 短时大暴雨 中尺度 

分 类 号：P458.3[天文地球—大气科学及气象学]