Gustiness and Coherent Structure of Strong Winds and Their Role in Dust Emission and Entrainment |
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| Authors: | ZENG Qingcun CHENG Xueling HU Fei and PENG Zhen |
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| Institution: | Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Department of Atmospheric Science, Nanjing University, Nanjing, Jiangsu 210093 |
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| Abstract: | After the passage of a cold front,spring in northern China,the outbreak of strong wind is often accompanied by dust emissions.Through analyses of data in the atmospheric boundary layer during a typical case,it is revealed there are rather regular gust wave packets superimposed on the basic strong wind flow.The gust-wind wave packets have a period equal to around 3-6 mins and possess coherent structure.As the vertical transport of momentum is decomposed into separate parts by(a) basic flow,(b) gust-wind,and(... |
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| Keywords: | gust-wind coherent structure descending motion dust storm soil erosion dust entrainment |
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