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

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-04
Major/Subject
Mcode
Degree programme
Language
en
Pages
2541-2551
Series
Journal of geophysical research: Space physics, Volume 124, issue 4
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://doi.org/10.1029/91JA01088), and Vassiliadis et al. (1990, https://doi.org/10.1029/GL017i011p01841, 1991, https://doi.org/10.1029/91GL01378) indicating that auroral geomagnetic indices could be reduced to low-dimensional systems withchaotic dynamics.
Description
Lisää published version 6 kk:n embargolla, kun julkaistu.
Keywords
Other note
Citation
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