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Ausloos M, Ivanova K. Power-law correlations in the southern-oscillation-index fluctuations characterizing El Niño. Phys Rev E Stat Nonlin Soft Matter Phys. 2001;63(4):047201doi: 10.1103/PhysRevE.63.047201.
Ausloos, M., & Ivanova, K. (2001). Power-law correlations in the southern-oscillation-index fluctuations characterizing El Niño. Physical review. E, Statistical, nonlinear, and soft matter physics, 63(4), 047201. https://doi.org/10.1103/PhysRevE.63.047201
Ausloos, M, and Ivanova, K. "Power-law correlations in the southern-oscillation-index fluctuations characterizing El Niño." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 63,4 (2001): 047201. doi: https://doi.org/10.1103/PhysRevE.63.047201
Ausloos M, Ivanova K. Power-law correlations in the southern-oscillation-index fluctuations characterizing El Niño. Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Apr;63(4):047201. doi: 10.1103/PhysRevE.63.047201. Epub 2001 Mar 28. PMID: 11308980.
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Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Apr;63(4):047201. doi: 10.1103/PhysRevE.63.047201. Epub 2001 Mar 28.

Power-law correlations in the southern-oscillation-index fluctuations characterizing El Niño.

Physical review. E, Statistical, nonlinear, and soft matter physics

M Ausloos, K Ivanova

Affiliations

  1. SUPRAS and GRASP, B5, Sart Tilman Campus, B-4000 Liège, Belgium.

PMID: 11308980 DOI: 10.1103/PhysRevE.63.047201

Abstract

The southern oscillation index (SOI) is a characteristic of the El Niño phenomenon. SOI monthly averaged data is analyzed for the time interval 1866-2000. The tail of the cumulative distribution of the fluctuations of SOI signal is studied in order to characterize the amplitude scaling of the fluctuations and the occurrence of extreme events. Large fluctuations are more likely to occur than the Gaussian distribution would predict. The time scaling of fluctuations is studied by applying the energy spectrum and the detrended fluctuation analysis statistical method. Self-affine properties are found to be pertinent to the SOI signal and therefore suggest power-law correlations of fluctuations of the signal. An antipersistent type of correlations exists for a time interval ranging from about 4 months to about 6 years. This leads to favoring specific physical models for El Niño description.

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