The Relationship Research Between Wind Speed and the Underlying Surface Roughness in Beijing During 1993—2011

doi:10.13474/j.cnki.11-2246.2017.0373

Abstract

Abstract: In recent years,Beijing has encountered serious air pollution problem. Atmospheric pollutants diffusion has a great correlation with the wind speed and the underlying surface roughness. Therefore,the 1993-2011 China ground international exchange station wind data are used to analyse the characteristics of the change of wind speed and direction in the ground. The results show that from 1993 to 2011 in Beijing,the average wind speed decreases. Since 2006 wind speed is significantly changed,the analysis shows that the frequency of north wind decreased may be a mainly reason. On this basis,we use the 2007-2011 ALOS PALSAR and night light data to extract and analyse the land expansion of Beijing. To analyze the relationship between wind speed and direction change of Beijing with surface roughness. The results show that the city expansion causes the increase of roughness,drags the north wind,leeds to decreased of wind speed and changes the wind field in Beijing city.

Key words: wind velocity, roughness, urbanization, nightlight, synthetic aperture radar, built-up area

CLC Number:

P237

LI Zhikun, ZHANG Fengli, WANG Guojun, SHAO Yun. The Relationship Research Between Wind Speed and the Underlying Surface Roughness in Beijing During 1993—2011[J]. 测绘通报, 2017, 0(12): 29-32.

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