6533b857fe1ef96bd12b429f
RESEARCH PRODUCT
Nonlinear energy dissipation in a cellular automaton magnetotail field model
Dimitris VassiliadisJouni TakaloJussi TimonenJuan Alejandro ValdiviaAlexander J. Klimassubject
PhysicsField (physics)MechanicsDissipationCellular automatonMagnetic fieldNonlinear systemCurrent sheetGeophysicsClassical mechanicsPhysics::Space PhysicsGeneral Earth and Planetary SciencesMagnetohydrodynamic driveMagnetohydrodynamicsdescription
A magnetic field model of the magnetotail current sheet based on cellular automaton (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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-07-01 | Geophysical Research Letters |