A nonlinear mechanism for magnetic reconnection and substorm activity

Details A nonlinear mechanism for magnetic reconnection and substorm activity A nonlinear mechanism for magnetic reconnection and substorm activity

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..921s&link_type=abstract

Geophysical Research Letters, vol. 7, Nov. 1980, p. 921-924.

Physics

Geomagnetic Tail, Lines Of Force, Magnetic Storms, Magnetohydrodynamic Stability, Tearing Modes (Plasmas), Collisionless Plasmas, Energy Dissipation, Magnetic Field Configurations, Nonlinear Systems

Scientific paper

The nonlinear effect of a background of microturbulence (in the lower hybrid/ion cyclotron frequency range) on the evolution of a tearing mode instability in the magnetospheric tail region is studied. It is found that the linearly stable collisionless tearing modes can be driven unstable by the additional dissipation due to the turbulent fluctuations. The growth times are of the order of 8 to 16 minutes. This mechanism could be important for understanding substorm activity and rapid magnetic reconnection in the tail region.

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