Correlation analysis between sand-dust events and meteorological factors in Shapotou,Northern China |
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| Authors: | Yang Fengmei E Chongyi |
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| Institution: | (1) College of Earth and Environmental Science, Lanzhou University, 730000 Lanzhou, China;(2) Key Laboratory of Western China’s Environmental Systems, MOE, Lanzhou University, 730000 Lanzhou, China |
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| Abstract: | The relationship between the sand-dust events in Shapotou and the meteorological factors from the meteorological stations
in Shapotou and three surrounding areas are analyzed in this article. The results show that the number of occurrences of floating
dust weather annually increases from 1988 to 1998 but there is no such tendency for the number of occurrences of blowing sand
and sandstorm. Meteorological factors are highly correlated with the frequency of floating dust weather and the correlation
decreased with the increase of distance from Shapotou. Due to the impact of global change and human activities, in parallel,
average relative humidity decreased year by year in these four areas, especially in Shapotou, resulting in an increase of
the frequency of floating dust weather. Alashan Zuoqi, which is the sand source area, strongly affects Shapotou blowing sand
and sandstorm. |
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