Analysis on Dust-floating Weather Features in the Western of Tarim Basin
塔里木盆地西部浮尘天气特征分析

We have analyzed the data of dust-floating weather phenomenon recorded by 11 meteorological stations during 1961-2003 in the western of Tarim basin,based on which we have got their spatial and temporal distribution characteristics and changing features in recently 43 years,and the relationship between the climate change and the dust-floating phenomena.Results show that the appearing frequency of dust-floating weather is much higher in the western of Tarim basin,and their spatial and temporal distribution is not even,their inter-year changing rate is bigger,and the lasting time of a dust-floating process is longer.The number of annual dust-floating days in the western of Tarim basin commonly decreased from 1961 to 2003 except for a gradually increasing at Shache station.Correlative analysis showed that there are clear positive correlation between dust-floating phenomenon and strong wind weather,and clear negative correlation between dust-floating phenomenon and precipitation of the whole year or spring.