Low-level wind shear observation based on different physical mechanisms by coherent Doppler lidar

1.Institute for Advanced Ocean Study, College of Information Science and Engineering, Ocean Remote Sensing Institute, Ocean University of China,Qingdao 266100,China;2.Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China;3.North China Regional Air Traffic Management Bureau of CAAC, Beijing 100621, China

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Supported by Civil Aviation Security Capacity Building Project (TM2017-228-1/2), National Natural Science Foundation of China (61975191?, 41905022)

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    In this paper, two coherent Doppler lidars were used to observe the low-level wind shear induced by dry thunder storms and terrain at Beijing Capital International Airport. The experiments 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.

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LIU Xiao-Ying, WU Song-Hua, ZHANG Hong-Wei, HE Zhi-Qiang, ZHANG Jian-Jun, WANG Xiao-Ye, CHEN Xiao-Min. Low-level wind shear observation based on different physical mechanisms by coherent Doppler lidar[J]. Journal of Infrared and Millimeter Waves,2020,39(4):491~504

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  • Received:October 31,2019
  • Revised:August 17,2020
  • Adopted:February 24,2020
  • Online: August 14,2020
  • Published: