Seasonal variation in dust events and the causes of the variation in the Tarim Basin, China |
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| Authors: | JinChang Li ZhiBao Dong and ShuSheng He |
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| Institution: | Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China.;Cold and Arid Regions, Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China.;Cold and Arid Regions, Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China. |
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| Abstract: | We analyzed dust event occurrence and its seasonal distribution at 16 sites in the Tarim Basin, China. Although the overall frequency of dust events was the highest in spring in this region, its variation in other seasons could be classified into three patterns: (1) frequency of dust events in autumn > that in summer > that in winter (at the Kashi and Kuche sites); (2) frequency in summer > that in winter > that in autumn (at the Ruoqiang site); and (3) frequency in summer > that in autumn > that in winter (at all other areas of the Tarim Basin). The frequency of dust events and their seasonal variations in the Tarim Basin were mainly controlled by wind speed and locally available dust sources; the former was the key control when dust sources did not differ significantly. The seasonal variation in evaporation had a smaller, but still significant effect on the frequency of dust events. |
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| Keywords: | Tarim Basin dust events seasonal variation sand-blowing wind |
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