[1]陈关清,方标.贵州铜仁暴雨和冰雹雷达回波特征对比分析[J].气象研究与应用,2015,36(01):72-75,85.
　Chen Guanqing,Fang Biao.Comparative analysis on radar echo of heavy rain and hail in Tongren Guizhou[J].Journal of Meteorological Research and Application,2015,36(01):72-75,85.
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贵州铜仁暴雨和冰雹雷达回波特征对比分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第36卷
期数:
2015年01期
页码:
72-75,85
栏目:
天气气候
出版日期:
2015-12-20

文章信息/Info

Title:
Comparative analysis on radar echo of heavy rain and hail in Tongren Guizhou
作者:
陈关清;  方标
铜仁市气象局, 贵州铜仁 554300
Author(s):
Chen Guanqing;  Fang Biao
Tongren Municipal Meteorological Service, Tongren Guizhou 554300
关键词:
冰雹; 暴雨; 雷达回波; 对比分析; 贵州铜仁
分类号:
P458
摘要:
利用铜仁新一代多普勒天气雷达对贵州铜仁区域的局地暴雨和冰雹天气过程的雷达监测常用产品进行对比分析,得出了产生暴雨和冰雹天气时其雷达回波特征的差异性:(1)冰雹回波反射率因子及剖面在较高的高度上维持较大强度,且其剖面通常具有穹窿结构,暴雨回波中通常有多个对流回波柱,强回波核位于云体中下部。(2)局地暴雨天气通常为混合型降水回波的"准静止"状态和长时间的"列车效应",冰雹回波其外形结构多呈点状、块状、带状等特征,有时候还会出现钩状、弓形回波等特殊形状;(3)暴雨径向速度和冰雹径向速度都存在逆风区等特征,短时强降水发生在逆风区边缘地带、径向速度辐合最大的区域。冰雹径向速度变化范围较大,有强烈的风向、风速辐合过程,有时还会伴随中尺度气旋。(4)冰雹回波的垂直液态水含量和回波顶高都比暴雨大,在降雹前2-5个体扫范围内冰雹回波的垂直液态水含量值会出现明显的跳变,而暴雨回波其值比较平稳并且维持较低数值。(5)VWP在冰雹过程中从低层到高层存在垂直风切变,其切变越大,出现冰雹的可能性越大,而暴雨的西风气流风速远小于冰雹过程。
Abstract:
Based on comparative analysis of local heavy rain and the hail weather radar monitoring products in Tongren from new generation Doppler weather radar, the differences of the radar echo characteristics are obtained:(1) the echo reflectivity factor of hail and profile usually in dome structure are at higher altitude and in larger intensity, while there are usually multiple convective echo column in the echo of rainstorm, and strong echo nuclear located at the middle and lower part of cloud. (2) local heavy rain is usually in" quasi static state" of mixed precipitation echo and " train effect" for a long period of time, but the appearance structure of hail echo show characteristics like:a dot, block, belt, sometimes hook and bow; (3) Both of the radial velocity of rainstorm and hail have the characteristics of upwind. The short-time strong rainfall occurred at the edge of upwind region and the radial velocity of the largest convergence area. By contrast, the radial velocity varying range of Hail is larger with convergence process between a strong wind direction and wind speed, sometimes accompanied by mesoscale cyclone. (4) the vertical liquid water content of the hail echo and echo top height is larger than that of the heavy rain, within 2-5 individual sweep range. vertical liquid water value of hail echo will appear obvious jump before hail, while the value of rainstorm echo is stable and maintain a lower value. (5) in the process of the hail the VWP exists vertical wind shear from low-level to high-level and the greater shear, the more chance of a hail, on the other hand, the wind speedof westerlies of heavy rain is far less than the hail process.

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备注/Memo

备注/Memo:
收稿日期:2014-10-15。
基金项目:黔气科合KF[2015]05号和中国气象局预报员专项《2014年贵州石阡4次罕见大暴雨过程对比分析》共同资助
作者简介:陈关清(1979-),男,硕士,工程师,短时临近预报,15908566611@139.com
更新日期/Last Update: 1900-01-01