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, (0):-, 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*
Observation and analysis of the structure of a severe convective hailstorm cloud over the eastern foot of Taihang mountain
投稿时间:2019-01-30  修订日期:2019-05-20
DOI:10.11676/qxxb2019.063
中文关键词:  强雹云 悬挂回波 大雹形成机制  动力结构模型 太行山东麓
英文关键词:Severe hail cloud  Overhang echo  Formation mechanism of big hail  Dynamic structure model  Eastern foot of Taihang Mountain
基金项目:
作者单位E-mail
范皓 邢台市气象局 fh121@163.com 
杨永胜 邢台市气象局 55808126@qq.com 
段英  duany2011@126.com 
许焕斌  xhb@mail.iap.ac.cn 
刘黎平  Lpliu@cams.cma.gov.cn 
耿飞  515038558@qq.com 
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中文摘要:
      2018年5月12日下午,太行山东麓发生了一次突发性强对流单体降雹天气过程。本文利用“太行山东麓人工增雨防雹作业技术试验示范”项目在冰雹发生区域内,获取的与本文研究较为密切相关的综合观测资料,从天气背景、降雹特征、回波演变特征、大雹形成机制及动力结构等进行了综合分析。结果显示,午后不稳定能量的增大形成了有利的热力条件和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的触发因素。通过对雹云在降雹时段雷达回波结构具有超长 “悬挂回波”和对应大雹形成特征分析表明,云中存在着上、中、下相互悬接着的零线(域),主上升气流2次逆时转弯,增加了雹胚再入主上升气流去继续长成大雹的机会,据此勾画出的云体主上升气流框架及大雹形成示意图,不仅佐证了冰雹“穴道”结构具有兜雹成雹的功能,而且显示出雹云的动力结构可具有多种表现样式,丰富了雹云物理的内容。
英文摘要:
      On the afternoon of 12 May 2018, a sudden severe convective cell hailstorm occurred in the eastern foothills of taihang mountain. Based on the comprehensive observation data obtained by the "Taihang Mountain Eastern Foothill Test" project , Some data which are closely related to the study in this paper, and the comprehensive analysis was conducted from the aspects of weather background, hail characteristics, echo evolution characteristics, formation mechanism of large hail and cloud dynamic structure. The results show that the favorable thermal conditions, the convergence disturbance of the wind field in the lower layer and the invasion of the cold air in the middle layer are the trigger factors for this strong convective hail cloud. Through the comprehensive analysis of the hail cloud radar echo, it is seen that the radar echo structure of the hail period has an ultra-long “overhang echo” feature, and the corresponding large hail formation characteristics, the cloud has the upper, middle and lower hanging zero lines(zero area), the main updraft two times of turning against the time, increasing the opportunity for the embryo to re-enter the main updraft airflow to grow go on. According to the sketch of the cloud main updraft airflow frame and the formation of the large hail, it not only proves that the hail “Cave channel” structure has the function of forming large hailstone, but also it shows that the dynamic structure for the real hailstorm can have multiple schemes of performance, which enriches the content of hail cloud physics.
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