Abstract
In this paper, multifractal properties of the Southern Oscillation Index (SOI) have been analyzed using Empirical Mode Decomposition (EMD) and Multifractal Detrended Fluctuation Analysis (MFDFA) for the time interval between 1991 to 2020. The joint application of the EMD and detrended fluctuation analysis methods allowed the signal to be separated into three subsets, each with different scaling properties. Then each of these subsequences was analyzed using the MFDFA.Results show that a different multifractality structure characterizes each subset. We observe the strongest multifractality in the macroscale component followed by the medium-scale subsequence. The microscale has the lowest multifractality of the three. The removal of temporal correlations by shuffling the sequences showed that the leading cause of multifractality is the different long-range correlations for small and large fluctuations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Atmospheric and Solar-Terrestrial Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
