Low-Level Wind Shear Characteristics and Lidar-Based Alerting at Lanzhou Zhongchuan International Airport,China

作     者：Lanqian LI Aimei SHAO Kaijun ZHANG Nan DING Pak-Wai CHAN Lanqian LI;Aimei SHAO;Kaijun ZHANG;Nan DING;Pak-Wai CHAN

作者机构：Key Laboratory for Semi-Arid Climate Change of the Ministry of EducationCollege of Atmospheric SciencesLanzhou UniversityLanzhou 730000 Gansu Sub-Bureau of Northwest Air Traffic Management Bureau of Civil Aviation of ChinaLanzhou 730087 Hong Kong ObservatoryKowloonHong Kong 999077 

出 版 物：《Journal of Meteorological Research》 (气象学报（英文版）)

年 卷 期：2020年第34卷第3期

页      面：633-645页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：Supported by the National Natural Science Foundation of China(41275102) Science and Technology Project of the Northwest Air Traffic Management Bureau of Civil Aviation of China in 2017 Special Fund for National Science and Technology Basic Research Program of China(2017FY100900) 

主　　题：low-level wind shear synoptic situations alerting algorithm Doppler lidar 

摘      要：Lanzhou Zhongchuan International Airport[International Civil Aviation Organization(ICAO)code ZLLL]is located in a wind shear prone area in China,where most low-level wind shear events occur in dry weather *** analyzed temporal distribution and synoptic circulation background for 18 dry wind shear events reported by pilots at ZLLL by using the NCEP final(FNL)operational global analysis data,and then proposed a lidar-based regional divergence algorithm(RDA)to determine wind shear intensity and ***-level wind shear at ZLLL usually occurs in the afternoon and evening in dry *** wind shear events occur in an unstable atmosphere over ZLLL,with changes in wind speed or direction generally found at 700 hPa and 10-m *** on synoptic circulations at 700 hPa,wind shear events could be classified as strong northerly,convergence,southerly,and weak wind *** proposed RDA successfully identified low-level wind shear except one southerly case,achieving94%alerting rate compared with 82%for the operational system at ZLLL and 88%for the ramp detection algorithm(widely used in some operational alert systems)based on the same *** RDA-unidentified southerly case occurred in a near neutral atmosphere,and wind speed change could not be captured by the Doppler lidar.