Dynamical characteristics of magnetospheric energetic ion time series: evidence for low dimensional chaos
Dynamical characteristics of magnetospheric energetic ion time series: evidence for low dimensional chaos
复制标题
磁层高能离子时间序列的动力学特征：低维混沌的证据
DOI：
10.5194/angeo-21-1995-2003
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
E. Sarris
中科院分区：
文献类型：
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作者：
M. Athanasiu;G. Pavlos;D. Sarafopoulos;E. Sarris
。本文是第一篇论文（Pav-los 等，2003）的姊妹篇，其中包含有关磁层高能离子时间序列动力学特征的重要结果。 Pavlos 等人描述了同一时间序列的低维和非线性确定性特征。 （2003）。在第二项工作中，我们提出了有关李亚普诺夫谱、互信息和预测模型的重要结果。将磁层离子信号的动态特性与存在有色噪声扰动时随机洛伦兹系统获得的相应特性进行比较。此外，通过使用非线性替代数据来检验磁层离子信号的动态特性的原假设。上述比较的结果为高能离子时间序列背后存在低维混沌动力学提供了重要证据。
. This paper is a companion to the first work (Pav-los 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.