Scale Invariance Analysis of the Time Series of Severe Sand and Dust Storm
强沙尘暴时序的标度不变性分析

The time series of severe sand and dust storm has complicated undulatory property. We analyze the time series of severe sand and dust storm occurred in the north of China in 49 years by the means of multifractal detrended f1uctuation analysis (MF-DFA). It is found that the time series is long range correlation. We affirm the severe sand and dust storm is multifractal. The strange multifractal spectrum is educed. The strong breeze, sand origin and thermodynamic instability are the principal factors forming severe sand and dust storm of China. Base on above of all, we discuss the relationship of the long range correlation and multifractal with the principal factors.