Low-level wind shear observation based on different physical mechanisms by coherent Doppler lidar
投稿时间:2019-10-31  修订日期:2020-05-29  download
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刘晓英 中国海洋大学 信息科学与工程学院 海洋遥感研究所 jupiter985@163.com 
吴松华 中国海洋大学 信息科学与工程学院 海洋遥感研究所 wush@ouc.edu.cn 
张洪玮 中国海洋大学 信息科学与工程学院 海洋遥感研究所  
何志强 中国民用航空华北地区空中交通管理局 气象中心  
张建军 中国民用航空华北地区空中交通管理局 气象中心  
王筱晔 中国海洋大学 信息科学与工程学院 海洋遥感研究所  
陈晓敏 中国海洋大学 信息科学与工程学院 海洋遥感研究所  
Abstract:In this paper, two coherent Doppler lidars were used to observe the low-level wind shear induced by dry thunderstorms and terrain at Beijing Capital International Airport. The experiment respectively adopted Doppler Beam Swing (DBS) and Glide Path wind shear identification method to alert the wind shear of the above two types. The results show that the DBS method and Glide Path mode can respectively identify horizontal wind shear caused by dry thunderstorms and terrain. Dry thunderstorms bring sudden increase of wind velocity, abrupt change of wind direction and strong convection of updrafts and downdrafts, which causes the low-level wind shear. Terrain-induced wind shear with the transient and sporadic nature is mainly produced by the interaction between high-speed airflow and complex underlying surface.
keywords:lidar,civil aviation safety,low-level wind shear,dry thunderstorms,terrain
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Copyright:《Journal of Infrared And Millimeter Waves》