气象科学2025，Vol.45Issue(3)：331-340,10.DOI:10.12306/2023jms.0017
两次强冷空气背景下"雪如意"复杂地形近地面风的演变特征
Feature analysis of surface wind on the complex terrain of"Snow RUYI"under the background of two strong cold air processes
摘要
Abstract
The National Ski Jumping Center(also known as"Snow RUYI")located at the eastern foot of the Damaqun in Zhangjiakou will host a series of ski jumping competitions at home and abroad.Based on the 10-minute observation data of nine automatic weather stations around"Snow RUYI"and the ERA5 reanalysis data,the refined spatial-temporal distribution characteristics of the wind field over complex terrain under the typical strong cold air on November,2021 were analyzed to reveal the spatial-temporal variation of the local wind field under the background of strong cold air,to have a deeper understanding of the influence of dynamic and thermal effects of complex terrain on wind field at different mountain heights,and to provide a reference for the prediction and numerical model improvement for winter Olympics and various international ski jumping events.The results show that(1)The south airflow affected the"Snow RUYI"mountain,and the terrain's blocking effect on the airflow disappeared.The wind direction and speed at each station of the mountain varied with the change of the ambient wind.(2)The westerly airflow affected the"Snow RUYI"mountain,and the terrain's blocking effect on airflow was related to the ambient wind speed.The ambient wind was less than 7 m·s-1,and the air flow was blocked by the"Snow RUYI"mountain.The wind speed in FOP area was less than 4 m·s-1.The wind direction in the daytime was mostly uphill easterly,and at night it was mostly downhill westerly.The ambient wind was between 7 m·s-1and 10 m·s-1,and the air flow could climb over the"Snow RUYI"mountain to form a downwind westerly wind in the leeward FOP area.At this time,the probability of the wind speed in the FOP area exceeding 4 m·s-1 was the highest.When the ambient wind exceeds 10 m·s-1,it interacted with the"bypass"and heat in the south of the mountain,forming"cavity circulation"and"wind shear"in the FOP area.The wind direction near the ground was east,and the probability of wind speed exceeding 4 m·s-1 was more than 20％.关键词
复杂地形/地面风/强冷空气/精细化Key words
complex terrain/surface winds/strong cold air/refinement分类
天文与地球科学引用本文复制引用
李禧亮,李江波,李嘉睿,杨玥,陈子健..两次强冷空气背景下"雪如意"复杂地形近地面风的演变特征[J].气象科学,2025,45(3):331-340,10.基金项目
冬奥赛场定点气象要素客观预报技术研究及应用(2018YFF0300104) （2018YFF0300104）
河北省气象局科研开发资助项目(21zc02) （21zc02）
