通辽市2016年6月22日强对流天气的特征及成因分析
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摘要
利用常规气象资料、多普勒雷达资料以及NCEP2.5°×2.5°再分析资料,从天气形势、物理量场和雷达回波演变特征分析2016年6月22日通辽市强对流天气成因。结果表明:此次强对流天气发生在中高层偏西气流带来的弱冷空气叠加在低层切变线南侧的暖湿空气之上,促使对流强烈发展;垂直累积液态含水量大值区和"逆风区"分别对冰雹和短时强降水有很好的指示意义;强对流天气发生在地面中尺度辐合线附近;高空急流与低层低涡的配置结构,为这次强对流天气提供了必要的动力条件。
Based on the conventional meteorological data, Doppler radar data and the NCEP reanalysis data(2.5°×2.5°), a strong convective weather process in Tongliao on June 22, 2016 was analyzed by the variation feature of weather situation, physical quantity field and radar echo. The results show that the strong convective weather is caused by the weak cold air in the middle and high-level westward streams superimposed on the warm and humid air on the south side of the low-level shear line, which leads to the strong development of convection. The vertical accumulative liquid water content maximum region and the headwind area have significant indication to the hail and the short term strong precipitation respectively. The strong convective weather occurs near the mesoscale convergence line in the ground. The configuration structure of the upper jet stream and the lower level vortex provides the necessary dynamic conditions for the strong convection weather.
Based on the conventional meteorological data, Doppler radar data and the NCEP reanalysis data(2.5°×2.5°), a strong convective weather process in Tongliao on June 22, 2016 was analyzed by the variation feature of weather situation, physical quantity field and radar echo. The results show that the strong convective weather is caused by the weak cold air in the middle and high-level westward streams superimposed on the warm and humid air on the south side of the low-level shear line, which leads to the strong development of convection. The vertical accumulative liquid water content maximum region and the headwind area have significant indication to the hail and the short term strong precipitation respectively. The strong convective weather occurs near the mesoscale convergence line in the ground. The configuration structure of the upper jet stream and the lower level vortex provides the necessary dynamic conditions for the strong convection weather.
引文
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[2]王雷,赵海林,张蔺廉.2004年7月两次强对流天气过程的对比分析[J].气象,2005,31(11):66-70.
[3]张芳华,张涛,周庆亮,等.2004年7月12日上海飑线天气过程分析[J].气象,2005,31(5):47-51,1.
[4]王军,周官辉,杜滨鹤,等.豫北一次飑线天气过程分析[J].气象,2002,28(11):37-41.
[5]沈杭锋,张红蕾,高天赤,等.浙江盛夏一次强对流天气的特征及其成因分析[J].气象,2016,42(9):1105-1113.
[6]万明波.2010年5月29—30日山东省强对流天气过程分析[J].内蒙古气象,2015(5):11-13.
[7]彭力,刘丹,郝双利,等.2014年唐山市一次强对流天气过程分析[J].内蒙古气象,2016(4):35-37,46.