Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm12a0467o&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SM12A-0467
Physics
7835 Magnetic Reconnection, 7843 Numerical Simulation Studies
Scientific paper
Topology of the Earth's magnetosphere is critically controlled by solar wind and the interplanetary magnetic field (IMF) via magnetic reconnection. Reconnection site and reconnection rate are mainly determined by the anti-parallel field condition and the relatively shear velocity. We have studied dynamics of magnetic reconnection at the dayside magnetopause and in the magnetotail in detail when the solar wind velocity and magnitude of the IMF change
over wide range of parameter by using a high resolution global MHD simulation. Dayside reconnection rate and cross polar cap potential have a tendency of saturation for a larger electric field in the solar wind. When we look at spatial distributions of the kinetic, internal and Poynting vector energy fluxes, it is noted that the kinetic energy quickly converts to internal plasma energy then Poynting flux. Therefore, it need not to find always the strong kinetic energy and kinetic flux on the earth side of NENL. The tail reconnection occurs in a patchy and intermittent manner to bring MHD fluctuations.
Ogino Takeshi
Walker Ray J.
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