Acta Scientiarum Naturalium Universitatis Pekinensis
MA Yu, XIAO Kaiti, WANG Xu1
The authors study the temporal and spatial distributions of dust weathers and the trends in occurring days of dust weathers using data from 28 observational stations in the Tarim Basin during the period of 1961-2003. Five meteorological factors, which affect dust weathers, are analyzed, including air temperature, daily range of ground temperature, air pressure, average wind speed and precipitation on dust weathers with the method of linear multi-regression. Based on the analyses, the indices of dust weathers are constructed. The results show that the regions where dust weathers occur most frequently are in the Taklimakan Desert and its southern marginal zone. The temporal and spatial distributions of dust weathers are different in these regions. Dust weathers occur most frequently in spring. The days of dust weathers are closely related to daily variations
of the meteorological factors. Dust-weather days have a tendency toward decrease. Interannual variations of dust-weather days have a period of about 6-9 years. According to their importance in affecting the occurrence of dust weathers, the factors are in an order of average wind speed, precipitation and daily range
of ground temperature over March-September. In spring, the dominant factor is precipitation. The dominant factor is average wind speed over June-September. Indices of dust weathers are constructed to demonstrate the temporal series of dust weathers and to predict the occurrence of dust weathers.
index of dust weather
MA Yu,XIAO Kaiti,WANG Xu. Climatological Characteristics of Dust Weathers in the Tarim Basin[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.
马禹,肖开提,王旭. 塔里木盆地沙尘天气的气候特征[J]. 北京大学学报（自然科学版）.
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