不同天气条件下近地层风速脉动特征

doi:10.13866/j.azr.2019.02.14

Abstract

Abstract: This study was based on the field observation and meteorological data at Tazhong in the Taklimakan Desert. The purposes of the study were to investigate the characteristics of wind velocity fluctuation over the quicksand surface in the desert hinterland,analyze the average wind speed and wind direction fluctuation on sunny day,in sandstorm and under blowing sand weather,and lucubrate the effects of sandstorm on the wind speed and wind direction fluctuation near the ground surface. The results are as follows: ① There was a good correlation of wind speed fluctuation at different heights higher than 0.5 m from the ground surface,especially there was a significant correlation of wind speed between the adjacent heights,and the correlation coefficient was higher than 0.68. The wind speed fluctuation range was proportional to the height; ② With the increase of height from the ground surface,the intensity of wind speed fluctuation was in an increase trend in sandstorm and under blowing sand weather,but it was increased at first and then decreased on sunny day. The increase of wind speed fluctuation intensity within 2-m height was higher than that at height range of 2-10 m under different weather conditions; ③ The wind direction fluctuation under different weather conditions was low and did not basically change with the height.

Key words: quicksand surface, airlayer near ground surface, wind speed fluctuation, fluctuation intensity, wind direction fluctuation, Taklimakan Desert

ZHENG Xian-nian, YANG Xing-hua, HE Qing, Eli Maimaityiming, JIN Li-li. Wind Speed Fluctuation near the Ground Surface over the Hinterland of the Taklimakan Desert under Different Weathers[J].Arid Zone Research, 2019, 36(2): 387-394.

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Wind Speed Fluctuation near the Ground Surface over the Hinterland of the Taklimakan Desert under Different Weathers

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