ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 48 Issue 2 > 2022,48(2):177-189. DOI:10.7519/j.issn.1000-0526.2022.010401 Prev Next
Characteristics of Meteorological Elements over Yanqing Area During Winter Olympic Games
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Abstract:
Based on observation data from 11 meteorological stations from January to March of 2019-2020 over the Yanqing Area of the 2022 Beijing Winter Olympic Games, spatio-temporal distributions of wind field and temperature are analyzed, and the correlation of gust factor with mean wind speed and turbulence intensity is established, so as to provide a reference for forecasting temperature and wind field in the complex terrain area, especially for the gust wind forecast. Generally, the daily high temperature occurs at 15:00 BT or 16:00 BT and the lowest temperature appears from 06:00 BT to 08:00 BT. Furthermore, the range of diurnal temperature decreases with the increase of altitude. The mean wind speed and wind gust have similar characteristics of diurnal variation. Taking S5 as the boundary, the winds at higher-altitude stations are relatively weaker in the daytime than at nighttime, while the diurnal variations of wind speeds at lower-altitude stations are opposite. Wind speeds at the stations with altitude above 1 〖KG-*5〗900 m usually increase with altitude. The wind direction at stations over mountain tops have no diurnal variation with a dominant direction of northwesterly. However, the wind directions at stations in the mountainsides and low-elevation areas are characterized by diurnal variation. Wind direction variation of the former is less noticeable, with the prevailing northwesterly in the daytime and westerly at nighttime, while the latter shows significant variation with a feature of mountain-valley breeze. The gust factor at S1 station has obvious diurnal variation with maximum value and large variation in the afternoon and relatively small value and lower spread at night. Finally, the linear relationship between the gust factor and turbulence intensity is established, and the gust factor based on turbulence intensity fitting is closer to the observed factor.
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