Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.490 IF 1.490
  • IF 5-year value: 1.445 IF 5-year
    1.445
  • CiteScore value: 2.9 CiteScore
    2.9
  • SNIP value: 0.789 SNIP 0.789
  • IPP value: 1.48 IPP 1.48
  • SJR value: 0.74 SJR 0.74
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 88 Scimago H
    index 88
  • h5-index value: 21 h5-index 21
Volume 21, issue 9
Ann. Geophys., 21, 1995–2010, 2003
https://doi.org/10.5194/angeo-21-1995-2003
© Author(s) 2003. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Complexity in the Earth's Magnetospheric Dynamics

Ann. Geophys., 21, 1995–2010, 2003
https://doi.org/10.5194/angeo-21-1995-2003
© Author(s) 2003. This work is distributed under
the Creative Commons Attribution 3.0 License.

  30 Sep 2003

30 Sep 2003

Dynamical characteristics of magnetospheric energetic ion time series: evidence for low dimensional chaos

M. A. Athanasiu, G. P. Pavlos, D. V. Sarafopoulos, and E. T. Sarris M. A. Athanasiu et al.
  • Department of Electrical and Computer Engineering, Demokritos Univercity of Thrace, 67100 Xanthi, Greece

Abstract. This paper is a companion to the first work (Pavlos et al., 2003), which contains significant results concerning the dynamical characteristics of the magnetospheric energetic ions’ time series. The low dimensional and nonlinear deterministic characteristics of the same time series were described in Pavlos et al. (2003). In this second work we present significant results concerning the Lyapunov spectrum, the mutual information and prediction models. The dynamical characteristics of the magnetospheric ions’ signals are compared with corresponding characteristics obtained for the stochastic Lorenz system when a coloured noise perturbation is present. In addition, the null hypothesis is tested for the dynamical characteristics of the magnetospheric ions’ signal by using nonlinear surrogate data. The results of the above comparisons provide significant evidence for the existence of low dimensional chaotic dynamics underlying the energetic ions’ time series.

Key words. Magnetospheric physics (energetic particles) – Radio sciences (nonlinear phenomena)

Publications Copernicus
Download
Citation