Jensen-Shannon Complexity and Permutation Entropy Analysis of Geomagnetic Auroral Currents

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Osmane , A , Dimmock , A P & Pulkkinen , T I 2019 , ' Jensen-Shannon Complexity and Permutation Entropy Analysis of Geomagnetic Auroral Currents ' , Journal of geophysical research. Space physics , vol. 124 , no. 4 , pp. 2541-2551 . https://doi.org/10.1029/2018JA026248

Title: Jensen-Shannon Complexity and Permutation Entropy Analysis of Geomagnetic Auroral Currents
Author: Osmane, Adnane; Dimmock, Andrew P.; Pulkkinen, Tuija I.
Contributor: University of Helsinki, Department of Physics
Date: 2019-04
Language: eng
Number of pages: 11
Belongs to series: Journal of geophysical research. Space physics
ISSN: 2169-9380
URI: http://hdl.handle.net/10138/305493
Abstract: In this study we determine whether auroral westward currents can be characterized by low-dimensional chaotic attractors through the use of the complexity-entropy methodology developed by Rosso et al. (2007, https:// doi.org/10.1103/PhysRevLett.99.154102) and based on the permutation entropy developed by Bandt and Pompe (2002, https://doi.org/10.1103/PhysRevLett.88.174102) . Our results indicate that geomagnetic auroral indices are indistinguishable from stochastic processes from time scales ranging from a few minutes to 10 hr and for embedded dimensions d <8. Our results are inconsistent with earlier studies of Baker et al. (1990, https://doi.org/10.1029/GL017i001p00041), Pavlos et al. (1992), D. Roberts et al. (1991, https://doi.org/10.1029/91GL00021), D. A. Roberts (1991, https://doLorg/10.1029/91JA01088), and Vassiliadis et al. (1990, https://doi.org/10.1029/GL017i011 p01841, 1991, https://doi.org/10.1029/91GL01378) indicating that auroral geomagnetic indices could be reduced to low-dimensional systems with chaotic dynamics.
Subject: AE-INDEX
INTERMITTENCY
MAGNETIC STORMS
MAGNETOSPHERIC ACTIVITY
PLASMA TRANSPORT
SELF-ORGANIZED CRITICALITY
SOLAR-WIND
SPACE
STOCHASTIC-SYSTEMS
STRANGE ATTRACTOR
114 Physical sciences
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