Nonlinear energy dissipation in a cellular automaton magnetotail field model

Details Nonlinear energy dissipation in a cellular automaton magnetotail field model Nonlinear energy dissipation in a cellular automaton magnetotail field model

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1813t&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 13, p. 1813-1816

Physics

Plasma Physics

26

Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Plasma Sheet, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Space Plasma Physics: Nonlinear Phenomena

Scientific paper

A magnetic field model of the magnetotail current sheet based on cellular automation (CA) is presented. The present isotropic model is a continuously driven, two-dimensional running CA. The model has a physical interpretation in terms of magnetohydrodynamic (MHD) equations, and features self-organized critical (SOC) behavior with power-law scalings both in durations and sizes of instabilities (avalanches). The model has nonlinear energy dissipation, and shows avalanches with and without an external trigger. Thus the model reproduces some of the statistical features recently observed in the magnetotail.

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