Physics
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsm24a..01b&link_type=abstract
American Geophysical Union, Spring Meeting 2007, abstract #SM24A-01
Physics
2768 Plasmasphere, 2784 Solar Wind/Magnetosphere Interactions, 2788 Magnetic Storms And Substorms (7954), 7835 Magnetic Reconnection (2723, 7526)
Scientific paper
Under normal or low levels of geomagnetic activity, outgassing from the dayside ionosphere builds up in the middle magnetosphere to form the high-density, cool plasmasphere. When geomagnetic activity increases, this dense plasma is convected across the dayside magnetosphere where it flows into the dayside reconnection site. Because of its high mass density, this plasma lowers the Alfven velocity at the dayside reconnection site, slowing the flow of plasma and magnetic field lines through the site. This lowers the rate of reconnection between the magnetosphere and the solar wind, reducing the strength of solar-wind/magnetosphere coupling. Theoretical calculations, computer simulations, and statistical evidence of this reduced coupling is presented. Implications for a magnetospheric control of the solar-wind/magnetosphere coupling during special circumstances is discussed.
Borovsky Joseph E.
Denton Michael H.
Hesse Matthias
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