豫北一次飑线天气过程诊断分析  

Diagnosis and Analysis of a Squall Line in North Henan

作　　者：张启绍 ZHANG Qi-shao(Anyang Meteorolog-ical Bureau,Anyang,Henan 45500)

机构地区：[1]安阳市气象局,河南安阳455000

出　　处：《农业灾害研究》2018年第5期48-52,共5页Journal of Agricultural Catastrophology

摘　　要：利用常规气象观测资料、FNL1°×1°数据、区域站资料和雷达回波等资料对2016年6月13日夜间到次日凌晨发生在河南北部的一次飑线天气过程进行了诊断分析。结果表明:此次过程是发生在中高层槽后西北气流控制、低层前倾槽过境的环境背景下的;此次过程发生前,河南北部存在较大的大气不稳定能量,但是湿层浅薄,是这次过程出现雷暴大风而未出现较强降水的主要原因;飑线的移向与地面中尺度辐合线移向基本一致,且地面中尺度辐合线出现比飑线提前1 h左右。移动速度快、出流边界和后侧入流槽口和近距离低仰角存在较大的径向速度是该次过程的主要雷达回波特征。Using the routine meteoro- logical observation data, FNL1°×1° da- ta, regional station data and radar echo data, a diagnostic analysis was conduct- ed on a squall weather process which occurred in North Henan from the night of June 13rd, 2016 to the early morning of the next day. The results showed that the process took place in the background of northwest high-level trough control of the northwest air flow and low-level for- ward dip tank transit environment. Before this process, there was a large atmo- spheric unstable energy in North Henan, but the wet layer was shallow and shal- low. It was the main reason for the strong thunderstorm without strong precipitation in this process. The shift of the squall line was basically consistent with the shift of the ground mesoscale conver- gence line, and the ground mesoscale convergence line appeared about l h ear- lier than the squall line. The rapid radial velocity at the outflow boundary, the in- flow notch at the rear side and the low elevation angle at close range were the main radar echo characteristics of this process.

关 键 词：飑线 前倾槽 中尺度辐合线 出流边界 

分 类 号：P458.12[天文地球—大气科学及气象学]