Detection of Complex Terrain-Induced Wind Shear by Doppler Lidar at Beijing Capital International Airport

Xiaoying Liu,Xi Zhang,Hongwei Zhang,Zhiqiang He,Jianjun Zhang,Songhua Wu,D Liu,Y Wang,F Moshary,Y Wu,B Gross

doi:10.1051/epjconf/202023706004

Abstract

In November 2018, the lidar-based wind shear synchronous experiment was performed at Beijing Capital International Airport (BCIA). In this experiment, aiming at the measurement of the terrain-induced wind shear and the wind field around the runway, the glide path scanning mode, and the RHI strategy were conducted alternately. Radial velocity retrieved from the glide path scanning can obviously present the wakes caused by complex terrain (e.g., hills, tall trees, residential and terminal buildings). The Pulse Coherent Doppler Lidar (PCDL) warned the terrain-induced wind shear, which was verified by the pilot report. The wind field structure around the runway under the wake effect and the building shielding effect is also analyzed.

Highlights

Wind shear has a great threat to aviation safety according to statistical reports [1]
This paper explores the complex terrain-induced wind shear by using Pulse Coherent Doppler Lidar (PCDL) and the wind field structure around the runway under the wake effect and the building shielding effect at Beijing Capital International Airport (BCIA)
The pilot reported the presence of wind shear in 01 runway at 19:03 on December 27, 2018, at this time, the background wind field is shown in the right half of Fig

Summary

INTRODUCTION

Wind shear has a great threat to aviation safety according to statistical reports [1]. On account of the limitations of conventional wind shear detection instruments (such as anemometer networks, weather radars, and wind profilers), lidar has gradually become the popular technology to observe and alert wind shear, with its high spatial-temporal resolutions and flexible scanning modes [2]. The terrain-induced wind shear becomes difficult for warning due to its high spatial and temporal variability wind field, which plays a dominant role in many factors with accounting for 70% in HKIA [2]. This paper explores the complex terrain-induced wind shear by using Pulse Coherent Doppler Lidar (PCDL) and the wind field structure around the runway under the wake effect and the building shielding effect at Beijing Capital International Airport (BCIA)

LIDAR EXPERIMENT METHODOLOGY

Complex terrain wakes and wind shear

Complex topography and wind field along the runway

CONCLUSIONS