Physics
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jgr...10527665t&link_type=abstract
Journal of Geophysical Research, Volume 105, Issue A12, p. 27665-27672
Physics
4
Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Numerical Modeling, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions
Scientific paper
A coupled-map model of the magnetotail is used to study the dynamics of the magnetosphere. Using different types of colored noise as an input to the model, it is shown that the high-frequency part of the behavior is intrinsic to the model, while the low-frequency part reflects the dynamics of the input time series. It is also shown that the relation of the power spectra of the magnetospheric input (vBS) and output (AE) time series is very similar to the relation of the power spectra of the model input and output. It is then argued that the magnetosphere acts, similarly to the model, as a low-pass filter. It is also suggested that the power law distributions of the AE data may be partly due to the power law distribution of polarity changes in the interplanetary magnetic field BZ.
Mursula Kalevi
Takalo Jouni
Timonen Jussi
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