王建恒,陈瑞敏. 2020. 一次强雹云结构的双多普勒雷达观测分析[J]. 气象学报, (0):-, 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 observation and analysis of the structure of severe hailstorm
投稿时间:2019-08-23  修订日期:2020-06-17
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(2017YFB0504002)
作者单位E-mail
王建恒 衡水市气象局 hs_wjh@126.com 
陈瑞敏 衡水市气象局 chenruimin007@sina.com 
摘要点击次数: 310
全文下载次数: 294
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”项目试验区内石家庄SA多普勒天气雷达资料和饶阳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,进而重点利用双多普勒雷达径向速度资料反演出格点的全风速(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;双多普勒雷达实测风场表明,实例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“零线”结构;不仅用实测雹云单体三维结构佐证了雹云降雹 “零线”结构的存在,而且验证其呈现形式可具有多样性。
英文摘要:
      By using the data of SA Doppler weather radar in Shijiazhuang and the data of X-band dual polarization radar in Raoyang in the experimental area of the project “Experimental Demonstration of Artificial Rainfall Enhancement and Hail Suppression Techniques at the Eastern Foot of Taihang Mountains”, and combining the conventional comprehensive observation data, we have a comprehensive analysis of the weather background, hail characteristics, radar echo evolution and three-dimensional echo structure of hail cloud in the eastern foot of Taihang Mountains, on the afternoon of June 13, 2018. Then using the radial velocity data of the dual Doppler radar, the full wind velocity (flow field) of the lattice point is retrieved, and the cell structure of hail cloud is analyzed by combining the echo characteristics. The results show that the strong northerly air jet stream at high altitude causes the transverse trough to turn vertical behind the eddy, and the cold air behind the trough moves southward along the northerly airflow, forming an unstable stratification of upper cold and dry with lower warm and wet, which results in the hail weather near the low-level vortex and on the convergence line of the ground. The wind field retrieved by dual-Doppler radar shows that in the middle layer of the hail storm, there are obvious s-shaped horizontal flow field and configuration characteristics of suspended echo. This is configured with a hail“zero line”structure. The existence of “zero line” structure is verified by the measured 3D structure in hail storm and the diversity of its manifestations are verified.
查看全文   查看/发表评论  下载PDF阅读器
分享按钮