A simulation study of forced reconnection processes and magnetospheric storms and substorms

Details A simulation study of forced reconnection processes and magnetospheric storms and substorms A simulation study of forced reconnection processes and magnetospheric storms and substorms

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....9010896l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Nov. 1, 1985, p. 10,896-10,910.

Physics

61

Geomagnetic Tail, Magnetic Field Reconnection, Magnetic Storms, Magnetospheric Instability, Plasma Dynamics, Incompressible Flow, Lines Of Force, Magnetohydrodynamics, Solar Terrestrial Interactions, Two Dimensional Flow

Scientific paper

On the basis of a two-dimensional incompressible MHD code, the plasma dynamics of a long magnetotail is simulated under a constant and time-varying driving force delivered from the solar wind. It is found that under a constant driving force the magnetic fields in the magnetail tend to reconnect impulsively and the formation of X line and plasmoids occurs intermittently and repeatedly every 2-4 hours. Under a time-varying driving force the post-driven phase of a plasmoid formation and the spontaneous reconnection process are also studied. The results show that magnetic reconnection in the magnetotail during magnetospheric substorms and storms is basically a driven process. A complete sequence of the event, going from the gradual pile-up of magnetic flux to the formation and the antiearthward convection of the new X line and to the ejection of plasmoids from the antiearthward end of the magnetotail, requires the presence of the driving force.

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