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气象:2016,42(11):1304-1314
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2016年6月23日江苏阜宁EF4级龙卷天气分析
(国家气象中心,北京 100081)
Analysis of the EF4 Tornado in Funing County, Jiangsu Province on 23 June 2016
(National Meteorological Centre, Beijing 100081)
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投稿时间:2016-10-08    修订日期:2016-10-27
中文摘要: 2016年6月23日,江苏省盐城市阜宁县发生了历史罕见的EF4级龙卷,导致99人死亡,846人受伤,并有大量建筑物被损毁。文章利用观测资料对产生强龙卷的天气背景和中尺度特征进行了分析,发现:阜宁龙卷发生在我国东部龙卷最高发的地区和季节,产生龙卷的天气尺度背景为典型的梅雨期暴雨环流,产生龙卷的中尺度对流系统发生在地面暖锋南侧,这里也是高低空急流耦合的区域,与高空急流相伴的动力强迫特征明显,大气热力不稳定条件为中等偏强;产生阜宁龙卷的中尺度对流系统与美国大部分强龙卷相似,为块状的离散单体对流模态,且具有经典超级单体的钩状回波和强中气旋特征,并伴有龙卷涡旋特征(tornado vortex signature,TVS);龙卷位于钩状回波顶端,主要发生在中气旋底高高度低于1 km期间。
Abstract:An extremely severe EF4 tornado struck Funing County, Jiangsu Province on 23 June 2016. The tornado killed 99 people, injured 846 others, and damaged many buildings. This paper focuses on the synoptic environment and mesoscale characteristics of the tornado by using all kinds of observation data. The tornado occurred in the most sensitive area and season with highest tornado occurrence frequency in East China. The synoptic environment for the tornado was the typical rainstorm circulation in Meiyu season. The tornado produced mesoscale convective system occurred in the south side of the surface warm front where the high level jet coupled with the low level jet. The strong deep level dynamical forcing characteristics are significant accompanied by high level jet, and the thermal dynamic unstable condition is moderately strong. The tornado produced mesoscale convective system was a discrete cell with elliptically shaped region of reflectivity which is the most favorable convective mode for significant tornado in the United States continent. The structure of cell is the same as the typical super cell with bow echo, severe mesocyclone and tornado vortex signature (TVS). Funing tornado was in the top of the bow echo and occurred during the period when the height of the mesocyclones was lower than 1 km.
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基金项目:国家重点基础研究发展计划(973计划)(2013CB430106)和公益性行业(气象)科研专项(GYHY201306011)共同资助
引用文本:
张小玲,杨波,朱文剑,方翀,刘鑫华,周康辉,蓝渝,田付友,2016.2016年6月23日江苏阜宁EF4级龙卷天气分析[J].气象,42(11):1304-1314.
ZHANG Xiaoling,YANG Bo,ZHU Wenjian,FANG Chong,LIU Xinhua,ZHOU Kanghui,LAN Yu,TIAN Fuyou,2016.Analysis of the EF4 Tornado in Funing County, Jiangsu Province on 23 June 2016[J].Meteor Mon,42(11):1304-1314.