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Wavelet-Based Multifractal Analysis of the El Niño/Southern Oscillation, the Indian Ocean Dipole and the North Atlantic Oscillation

机译:基于小波的厄尔尼诺/南方涛动,印度洋偶极子和北大西洋涛动的多重分形分析

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References(7) Cited-By(3) Supplementary materials(1) Climate change can be interpreted from the perspective of fractals. This study uses the wavelet transform to analyze the multifractal behavior of the monthly El Niño/Southern Oscillation index (NINO3.4), the monthly Indian Ocean Dipole Mode Index (DMI), and the monthly North Atlantic Oscillation (NAO) index. Strong multifractality was observed when NINO3.4 and DMI had high coherency. Changes from multifractal to monofractal behavior were observed at the 1976/77 regime shift for NINO3.4 and DMI, and at the 1988/89 regime shift for NAO index. We found that a regime shift occurs when the fluctuation is large and multifractality is strong.
机译:参考文献(7)被引用的文献(3)补充材料(1)气候变化可以从分形的角度来解释。本研究使用小波变换分析了每月厄尔尼诺/南方涛动指数(NINO3.4),每月印度洋偶极子模式指数(DMI)和每月北大西洋涛动(NAO)指数的多重分形行为。当NINO3.4和DMI具有高相干性时,观察到了很强的多重分形性。对于NINO3.4和DMI,在1976/77政权转移中以及在针对NAO指数的1988/89政权转移中,观察到从多形到单形的行为变化。我们发现,当波动大且多重分形性强时,会发生状态转移。

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