激光技术2024，Vol.48Issue(3)：318-326,9.DOI:10.7510/jgjs.issn.1001-3806.2024.03.004
1.55 μm激光雷达高原机场下击暴流探测应用研究
Application research of 1.55 μm wind LiDAR in detecting downburst on a plateau airport
摘要
Abstract
To explore the wind field detection effect and low-level wind shear identification ability of light detection and ranging(LiDAR)during a wet downburst,a typical wet downburst storm process on 2021-05-18 was analyzed and investigated by using wind LiDAR and meteorological observation records from Xining Caojiapu International Airport,and using the method of combining multiple data with specific events for theoretical analysis and data validation.The results show that the downburst has complex wind field structures.Before the downburst arrived at the airport,the downdraft outflow exceeded 14 m/s,which is coupled with the ambient wind to form a headwind shear convergence line,and the strongest outflow region is located 1 km to 2 km behind the convergence line.When the downburst arrives over the runway,it creates a divergence wind field on the ground.The wind speed in the center of the divergence area is much lower than that at the edge of the outflow,the vertical airflow had drastic changes,and the downburst lasted for about 10 min.The LiDAR has a good identification of the vertical airflow distribution inside the cumulonimbus,the fine structure of the divergence wind field,and the formation and evolution of the convergence line.The interactive use of different detection patterns and data products of LiDAR is very conducive to monitoring and warning of low-level wind shear at the airport.This study provides a reference for the application of LiDAR in the prediction and research of downburst wind shear.关键词
激光技术/测风激光雷达/精细结构/湿下击暴流/低空风切变/垂直气流Key words
laser technique/wind light detection and ranging/fine structure/wet downburst/low-level wind shear/vertical airflow分类
电子信息工程引用本文复制引用
牛向华,黄轩,朱文会,郑佳锋,唐顺仙,任涛,程振..1.55 μm激光雷达高原机场下击暴流探测应用研究[J].激光技术,2024,48(3):318-326,9.基金项目
四川省自然科学基金资助项目(2022NSFSC0209) （2022NSFSC0209）
