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| Titel |
SVD analysis of the magnetospheric AE index time series and comparison with low-dimensional chaotic dynamics |
| VerfasserIn |
M. A. Athanasiu, G. P. Pavlos |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 8, no. 1/2 ; Nr. 8, no. 1/2, S.95-125 |
| Datensatznummer |
250005290
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| Publikation (Nr.) |
 copernicus.org/npg-8-95-2001.pdf |
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| Zusammenfassung |
| The singular value
decomposition (SVD) analysis is used at different stages in this paper in
order to extract useful information concerning the underlying dynamics of
the magnetospheric AE index. As a frame of reference we use the dynamics
of the Lorenz system perturbed by external noise, white or colored. One of
the critical results is that the colored noise can be differentiated from
the white noise when we study their perturbation upon the eigenvalue
spectrum of the trajectory matrix, the SVD reconstructed components of the
original time series and other characteristics. This result is used in
order to conclude the existence of strong component of colored noise
included in the magnetospheric AE index time series. Moreover, the study
of the SVD reconstructed components of the original time series can
confirm the low-dimensionality of a dynamical system strongly perturbed by
external colored noise. Finally, the results of this study strengthen the
hypothesis of the magnetospheric chaos. |
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