The Trend and Influencing Factors of the Sand and Dust Weather in Tazhong Oil Base

The analysis on yearly and seasonal changes of floating dust,blowing sand and sand storms from 1997 to 2005 indicates: 1.The sand and dust weather frequently appear in spring and summer;2.the trend of the sand and dust weather in Tazhong Oil Base in recent 9 years is: totally stable with minor changes,less days of sand storms and more days of floating dust and blowing sand;3.the sand and dust weather is related to temperature,precipitation,evaporation and seasonal wind,and is influenced by human activities.