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Position: Home > Articles > Cause analysis of rainstorm process in Fujian Province on 19～20 March 2018 2018 (9) 83-85+100

2018年3月19～20日福建省暴雨过程成因分析

作  者：
陈婧;李汉菁;林珠应
单  位：
福建省福州市长乐区气象局
关键词：
春季暴雨;西南急流;锋面;短时强降水;飑线
摘  要：
春季暴雨常由暖区降水和锋面降水结合而成,对流性明显,对春耕生产和人员安全有较大影响。本文应用地面加密观测资料、常规探测资料和雷达回波资料,对2018年3月19～20日福建省暴雨过程的环流形势背景、中尺度特征和物理量场进行分析。结果表明:本次暴雨是一场暖区降水和锋面降水结合的暴雨过程。高低空西南急流充沛的水汽输送和不稳定能量,锋面、低层切变的辐合上升运动是形成暴雨和强对流的有利条件。冷暖空气的交汇加剧了层结不稳定和垂直上升运动,触发福建南部飑线产生。中高层显著的正涡度发展、低层辐合高层辐散以及上干下湿的对流不稳定都有利于激发释放大量不稳定能量,产生暴雨和强对流天气。
译  名：
Cause analysis of rainstorm process in Fujian Province on 19～20 March 2018
作  者：
Chen Jing;Li Hanjing;Lin Zhuying;Meteorological Bureau of Changle District, Fuzhou City, Fujian Province;
单  位：
Chen Jing%Li Hanjing%Lin Zhuying%Meteorological Bureau of Changle District, Fuzhou City, Fujian Province
关键词：
spring torrential rain;;southwest jet;;front;;short time heavy rainfall;;squall line
摘  要：
Spring rainstorm is usually formed by the combination of warm area precipitation and frontalprecipitation, with obvious convection, which has a great impact on spring farming production and per-sonnel safety. In this paper, the circulation situation background, Mesoscale Characteristics and physi-cal quantity field of the heavy rain process in Fujian Province from March 19 to 20, 2008 are analyzedby using ground intensive observation data, conventional sounding data and radar echo data. The resultsshow that the rainstorm is a rainstorm process combined with warm precipitation and frontal precipita-tion. The abundant water vapor transport and unstable energy, the convergent and upward movement offrontal and low-level shear are favorable conditions for the formation of heavy rain and strong convec-tion. The intersection of cold and warm air aggravates stratification instability and vertical upward move-ment, triggering the formation of squall line in southern Fujian. Significant positive vorticity develop-ment in the middle and upper levels, convergence in the lower level, divergence in the upper level andconvective instability in the upper dry and lower humidity are conducive to exciting and releasing alarge amount of unstable energy, resulting in heavy rain and severe convective weather.

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