Remote-sensing and In Situ Study of Inner Magnetospheric Coupling During Storms and Substorms

Details Remote-sensing and In Situ Study of Inner Magnetospheric Coupling During Storms and Substorms Remote-sensing and In Situ Study of Inner Magnetospheric Coupling During Storms and Substorms

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm13a1192g&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM13A-1192

Other

2712 Electric Fields (2411), 2730 Magnetosphere: Inner, 2736 Magnetosphere/Ionosphere Interactions, 2760 Plasma Convection, 2788 Storms And Substorms

Scientific paper

During storms and substorms, the inner magnetosphere responds as a globally-coupled system. The components of this system are the plasmasphere, ring current, plasma sheet, and ionosphere. We present observations by IMAGE (which provides global snapshots of the plasmasphere, ring current, and aurora), by ground-based GPS receivers (which measure total electron content), and by in situ spacecraft both at geosynchronous orbit (i.e., LANL) and at ionospheric altitudes (i.e., DMSP). During mild storms with little or no substorm activity, (e.g., 17-18 June 2001) the inner magnetosphere responds mainly to external driving by the solar wind and IMF. During substorms (e.g., 17 April 2002) the inner magnetosphere evolves under the influence of both external and internal processes. We examine the coupling between the high-altitude equatorial plasmapheric plasma, and the ionospheric plasma at the footpoints of the magnetic field lines that pass through the plasmasphere. Weak coupling would result in, among other things, an altitude-dependent L-value for the location of the plasmapause. Strong coupling might occur especially during times when strong region 1 and region 2 current systems are in place.

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