The Formation of Superdense Plasma Sheet near Geosynchronous Orbit

Details The Formation of Superdense Plasma Sheet near Geosynchronous Orbit The Formation of Superdense Plasma Sheet near Geosynchronous Orbit

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm33d..08l&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM33D-08

Physics

2722 Forecasting (7924, 7964), 2736 Magnetosphere/Ionosphere Interactions (2431), 2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

We have studied the formation of superdense plasma sheet (SDPS) near the geosynchronous orbit by analyzing the observations of the 09/14/2001 event and by simulating this event using the global MHD model Open Geospace General Circulation Model (OpenGGCM). We find that the superdense plasma sheet near the geosynchronous orbit is of solar wind origin. This SDPS is formed when IMF turns southward at the magnetopause after an extended interval of northward IMF, which has lead to the formation of a cold dense plasma sheet (CDPS) around 20 RE in the tail before the arrival of southward IMF. The new open field lines adding to the tail first compress the lobes and subsequently the plasma sheet, then cause a reconnection to occur between the compressed closed field lines, and then the compressed field lines of the northern and southern lobes. A piece of the cold dense plasma sheet is consequently accelerated toward the Earth, and passes through the geosynchronous orbit. The near-tail reconnection is also related to a substorm that occurs after the arrival of the southward IMF in conjunction with the SDPS event.

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