范皓,杨永胜,段英,许焕斌,刘黎平,耿飞. 2019. 太行山东麓一次强对流冰雹云结构的观测分析[J]. 气象学报, 77(5):823-834, doi:10.11676/qxxb2019.063
太行山东麓一次强对流冰雹云结构的观测分析
An observational analysis of the cloud structure of a severe convective hailstorm over the eastern foothill of Taihang Mountain
投稿时间:2019-01-30  修订日期:2019-07-07
DOI:10.11676/qxxb2019.063
中文关键词:  强雹云  悬挂回波  大冰雹形成机制  动力结构模型  太行山东麓
英文关键词:Severe hailstorm clouds  Overhanging echo  Formation mechanism of large hail  Dynamic structure model  Eastern foothill of Taihang Mountain
基金项目:国家重点研发计划(2017YFB0504002)、河北省“十三五”气象重点项目(hbrywcsy-2017-06)。
作者单位E-mail
范皓 邢台市气象局, 邢台, 054000
河北省气象与生态环境重点实验室, 石家庄, 050021 
 
杨永胜 邢台市气象局, 邢台, 054000
河北省气象与生态环境重点实验室, 石家庄, 050021 
55808126@qq.com 
段英 河北省气象与生态环境重点实验室, 石家庄, 050021
河北省人工影响天气办公室, 石家庄, 050021 
 
许焕斌 北京应用气象研究所, 北京, 100082  
刘黎平 中国气象科学研究院灾害天气国家重点实验室, 北京, 100081  
耿飞 邢台市气象局, 邢台, 054000
河北省气象与生态环境重点实验室, 石家庄, 050021 
 
摘要点击次数: 55
全文下载次数: 68
中文摘要:
      利用“太行山东麓人工增雨防雹作业技术试验示范”项目在冰雹发生区获取的综合观测资料,从强对流单体出现的天气背景、降雹特征、雷达回波演变、大冰雹的形成机制及动力结构等方面对2018年5月12日下午发生于太行山东麓的一次强对流单体降雹天气过程进行了分析。结果显示,午后不稳定能量的增大形成了有利的热力条件,低层风场的辐合扰动以及中层的冷空气侵入是产生本次强冰雹过程的触发因素。通过对雹云降雹时段雷达回波具有超长“悬挂回波”和对应大雹形成特征分析表明,云中存在着上、中、下相互衔接的0线(域),主上升气流2次逆时针转弯增加了雹胚再入主上升气流区继续长成大雹的机会,据此勾画出了云体主上升气流框架及大冰雹的形成机制,表明冰雹在雹云中的生长有多种模式。
英文摘要:
      In the afternoon of 12 May 2018, a severe convective cell and hailstorm suddenly occurred in the eastern foothill of Taihang Mountain. In order to explore the mechanism for hail formation, comprehensive observations obtained from the "Artificial Rain Enhancement and Hail Control Experiment in the Eastern Foothill of Taihang Mountain" project are analyzed from perspectives of weather background, hail characteristics, echo evolution characteristics, formation mechanism of large hail and cloud dynamic structure. The results show that the favorable thermal condition, the convergence disturbance of the wind field in lower levels and the invasion of cold airmass in middle levels are the trigger factors for this strong convective hailstorm. The comprehensive analysis of radar echoes reveals an ultra-long "overhanging echo" feature during the hailstorm period, which, combined with the corresponding large hail formation characteristics, indicates that zero lines (zero area) existed in the upper, middle and lower levels of clouds. The main updraft recurved counterclockwise twice, increasing the opportunity for the embryos to re-enter the main updraft and continue to grow. The schematic diagram of the main updraft in clouds and the formation of large hail shows that the hailstorm can develop in multiple formats.
HTML   查看全文   查看/发表评论  下载PDF阅读器
分享按钮