Statistics – Applications
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm13c1462m&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM13C-1462
Statistics
Applications
2723 Magnetic Reconnection (7526, 7835), 2744 Magnetotail, 2753 Numerical Modeling, 2790 Substorms
Scientific paper
A Hall magnetohydrodynamic (MHD) simulation is conducted to study magnetotail dynamic processes starting with realistic magnetotail geometry. With different imposing boundary conditions, the magnetic reconnection can be initiated in the near Earth region inside15 or the middle tail outside 20 . For the case with the reconnection in the near Earth region, the results indicate that sudden disruption of cross-tail current is triggered by fast magnetic reconnection with the reconnection rate over 0.1. We observe all substorm phases: early slow growth phase, late impulsive growth phase, substorm onset, and expansion phase with time scales that well agree with the satellite observations. Substantial increases of parallel electric field, field-aligned currents, and Earthward bulk flow in this simulation are observed immediately after the substorm onset. For the case with the reconnection first initiated in the middle tail, the results indicate that the magnetotail dynamics behaves rather different. The possible applications to the substorm are also discussed.
Ma Zhibo
Zhang Caicheng
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