The effects of ionospheric outflow on magnetotail dynamics

Details The effects of ionospheric outflow on magnetotail dynamics The effects of ionospheric outflow on magnetotail dynamics

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm11b0818r&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM11B-0818

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2431 Ionosphere/Magnetosphere Interactions (2736), 2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail

Scientific paper

Using the University of Michigan MHD code, we have simulated the magnetospheric dynamics during a number of different hypothetical IMF orientation changes. When the IMF turns from north to south, the magnetospheric tail becomes long and thin. After a number of minutes, reconnection forms in the near-Earth region. This is basically due to the lack of plasma in the ideal-MHD plasma sheet. We have rerun the simulations with a variety of ionospheric outflow rates, and show that the outflow can strongly control both the length of time in which the thin-tail can be sustained and the method of energy release in the tail. These results indicate that the ionospheric outflow rate, or the rate of plasma injection of other sources into the plasma sheet, may be a primary controller for the magnetotail dynamics.

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