热带气象学报2025，Vol.41Issue(2)：260-269,10.DOI:10.16032/j.issn.1004-4965.2025.024
复杂地形下冬奥古杨树赛区山谷风环流特征分析
Analysis of Valley Wind Circulation Characteristics in the Guyangshu Winter Olympics Competition Area Under Complex Terrain
摘要
Abstract
This study investigates the dynamics and characteristics of air flow in the Guyangshu competition area by analyzing intensive observation of automatic weather stations and ERA5 reanalysis data collected in the Winter Olympics field from 2017 to 2020.Considering its distinct topography and the context of atmospheric circulation,wind vector averaging and composite analysis methods are employed to improve analyses.Results indicate that the Guyangshu competition area is highly influenced by terrain and thermal effects,resulting in significant differences in terrain wind characteristics.Daytime wind directions are relatively scattered,with speeds mostly below 4-5 m·s-1.At night,wind directions are more concentrated,and speeds are generally below 2-3 m·s-1.Within the same competition venue,stations dominated by down-slope winds have lower wind speeds,mainly below 1-2 m·s-1,compared to those dominated by down-valley winds.Under weak cold air conditions,wind direction shifts typically occur around 08:00 in the morning and between 17:00-19:00 in the evening.The transition period averages 1.5-2 hours,with the timing and duration of these changes are significantly influenced by solar radiation.As the wind direction changes,wind speeds first decrease and then increase.In the winter competition areas,the lowest average daily wind speeds are observed around 09:00,while peak average daytime wind speeds are observed between 12:00 and 14:00.In off-road competition zones,the highest daily average wind speeds are recorded between 12:00 and 15:00.The average daily wind speeds at each station correlate with the terrain's wind scale in their locations,with stations influenced by valley winds often have higher speeds than those affected by slope winds.关键词
冬奥/谷风/坡风/复杂地形/冷空气Key words
Winter Olympics/valley wind/slope wind/complex terrain/cold air分类
大气科学引用本文复制引用
张晓瑞,田志广,李政昊,黄兆楚,朱刚,李禧亮..复杂地形下冬奥古杨树赛区山谷风环流特征分析[J].热带气象学报,2025,41(2):260-269,10.基金项目
国家重点研发计划"科技冬奥"专项(2018YFF0300101、2018YFF0300104) （2018YFF0300101、2018YFF0300104）
河北省科技冬奥专项(19975414D) （19975414D）
河北省气象局科研开发项目(22ky21)共同资助 （22ky21）
