基于风廓线雷达和地面观测资料的风切变时空分布特征分析  

Analysis of Temporal and Spatial Distribution Characteristics of Wind Shear Based on Wind Profile Radar and Automatic Observation Data

作　　者：王周鹤 毕波 WANG Zhouhe;BI Bo(Dali Airport of Yunnan Airport Group,Dali 671000,Yunnan,China)

机构地区：[1]云南机场集团大理机场,云南大理671000

出　　处：《民航学报》2021年第4期76-81,共6页Journal of Civil Aviation

基　　金：高原山地机场冬春季大风预报方法的研究项目(2021JC19)。

摘　　要：利用2014~2019年大理机场航空器报告风切变资料,结合气象自动观测系统和风廓线雷达资料,分析风切变的时空分布特征,结果表明:1)大理机场风切变和大风年变化基本一致,出现在11月至次年5月,但日变化不一致,风切变集中出现在两个时段,08:00~11:00时段是大风低谷时段,16:00~18:00时段是大风高峰时段;2)低空风切变占比高达86%,决断高度以下占比达50%,是大气运动变化受地形影响所致;3)发生风切变的天气系统主要有高空槽、切变线、高压脊和高空急流;4)风切变发生时,地面观测站资料和风廓线雷达资料的异常变化特征,对监测和预警风切变具有重要指示意义。Based on the wind shear report data of aircraft at Dali Airport during 2014 to 2019,and the data of the automatic meteorological observation system and the wind profile radar,the spatial and temporal distribution characteristics of wind shear are analyzed,The results show that:1) The annual variation of wind shear is basically the same as strong wind,it appears during November to May of the following year,Yet the diurnal variation is not consistent,and the wind shear is concentrated in two periods,08:00~11:00 is the gale trough period,and 16:00~18:00 is the gale high frequency period.2) The low altitude wind shear accounts for up to 86%,and below the decision height it accounts for up to 50%.The cause is that the terrain changes the movement of the atmosphere.3) The weather system in which wind shear occurs mainly includes upper trough,shear line,highpressure ridge and upper-level jet stream.4) When wind shear occurs,the abnormal change characteristics of automatic weather station data and the wind profile radar data are of certain indicative significance for monitoring and early warning of wind shear.

关 键 词：航空器 风切变 风廓线雷达 自动观测 

分 类 号：V321.225[航空宇航科学与技术—人机与环境工程]