 |
| Titel |
Chaos in magnetospheric radio emissions |
| VerfasserIn |
A. C.-L. Chian, E. L. Rempel, F. A. Borotto |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 9, no. 5/6 ; Nr. 9, no. 5/6, S.435-441 |
| Datensatznummer |
250006558
|
| Publikation (Nr.) |
 copernicus.org/npg-9-435-2002.pdf |
|
|
|
|
|
| Zusammenfassung |
| A three-wave model
of auroral radio emissions near the electron plasma frequency was proposed
by Chian et al. (1994) involving resonant interactions of Langmuir,
whistler and Alfvén waves. Chaos can occur in the nonlinear evolution of
this three-wave process in the magnetosphere. In particular, two types of
intermittency, due to either local or global bifurcations, can be
observed. We analyze the type-I Pomeau-Manneville intermittency, arising
from a saddle-node bifurcation, and the crisis-induced intermittency,
arising from an interior crisis associated with a global bifurcation.
Examples of time series, power spectrum, phase-space trajectory for both
types of intermittency are presented through computer simulations. The
degree of chaoticity of this three-wave process is characterized by
calculating the maximum Lyapunov exponent. We suggest that the
intermit-tent phenomena discussed in this paper may be observed in the
temporal signal of magnetospheric radio emissions. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|