王建恒,陈瑞敏,胡志群,许焕斌,段英,赵孝伟,王霞. 2020. 一次强雹云结构的双多普勒雷达观测分析[J]. 气象学报, 78(5):796-804, doi:10.11676/qxxb2020.061
一次强雹云结构的双多普勒雷达观测分析
Dual Doppler radar observations and analysis of the structure of a severe hailstorm
投稿时间:2019-09-15  修订日期:2020-07-01
DOI:10.11676/qxxb2020.061
中文关键词:  强雹云  回波三维结构  S形流场  双多普勒雷达风场反演  观测分析
英文关键词:Severe hailstorm  3D echo structure  S-shaped horizontal flow field  Wind retrieval using dual Doppler radar  Observation and analysis
基金项目:河北省“十三五”气象重点项目(hbrywcsy-2017-05)、国家重点研发计划项目(2017YFB0504002)
作者单位E-mail
王建恒 衡水市气象局衡水053000
河北省气象与生态环境重点实验室石家庄050021 
 
陈瑞敏 衡水市气象局衡水053000
河北省气象与生态环境重点实验室石家庄050021 
chenruimin007@sina.com 
胡志群 中国气象科学研究院灾害天气国家重点实验室北京100081  
许焕斌 北京应用气象研究所北京100082  
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 
 
赵孝伟 衡水市气象局衡水053000
河北省气象与生态环境重点实验室石家庄050021 
 
王霞 衡水市气象局衡水053000
河北省气象与生态环境重点实验室石家庄050021 
 
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中文摘要:
      利用石家庄SA多普勒天气雷达和饶阳X波段双偏振雷达探测资料,结合常规综合观测资料,对2018年6月13日下午发生于太行山东麓的雹云的天气背景、降雹特征、雷达回波演变特征及回波三维立体结构进行了综合分析,重点利用双多普勒雷达径向速度资料反演出格点的三维风速(流场),并结合回波特征分析了雹云云体结构。结果显示,高空强劲的偏北风急流促使涡后横槽转竖,槽后冷空气沿偏北气流南下,形成上干冷、下暖湿的不稳定层结,在低空低涡附近及地面辐合线上发展造成这次风雹天气;双多普勒雷达反演风场表明,雹云的中层强回波中心呈明显的“S”形水平流场和悬挂回波配置特征,构成了具有成雹的“0线”结构;不仅佐证了雹云降雹“0线”结构的存在,而且证明其呈现形式具有多样性。
英文摘要:
      A comprehensive analysis is conducted to investigate the weather background, hail characteristics, radar echo evolution and three-dimensional echo structure of the hail clouds that developed in the eastern foothill of the Taihang Mountains in the afternoon of 13 June 2018. Observations of the SA Doppler weather radar in Shijiazhuang and the X-band dual polarization radar in Raoyang are used in this study. Three-dimensional (3D) gridded wind velocity (flow field) is retrieved from the radial velocity of the dual Doppler radar, and the hail cloud structure is analyzed based on the echo characteristics. The results show that the strong upper-level northerly jet caused the transverse trough to turn vertical, and the cold air behind the trough moved southward along the northerly airflow. Unstable stratification developed with cold and dry air above warm and wet air, which resulted in the hail weather near the low-level vortex and along the convergence line in the surface. The wind field retrieved from dual-Doppler radar observations shows that in the middle layer of the hail storm, there existed obvious S-shaped horizontal flow with characteristics of suspended echo. This is a typical "zero-line" structure conductive to hail formation. The existence of the "zero line" structure is confirmed by the observed 3D structure in hail storm and the diversity of its manifestation is demonstrated.
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