强沙尘暴时序的标度不变性分析

强沙尘暴规模的时间序列具有复杂的波动性.运用多重分形消除趋势波动分析法分析我国北方近49年来的强沙尘暴序列.发现序列具有长程相关性;并确认强沙尘暴是多重分形过程,进而得出序列的多重分形谱.在此基础上,探讨了序列长程相关性和多重分形特征与强风、沙源和热力不稳定等我国北方强沙尘暴形成的主要因素之间的联系.

Scale Invariance Analysis of the Time Series of Severe Sand and Dust Storm

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.