Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm32b..02i&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM32B-02
Physics
[2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2431] Ionosphere / Ionosphere/Magnetosphere Interactions, [2730] Magnetospheric Physics / Magnetosphere: Inner, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions
Scientific paper
The transport of ionospheric plasma into the magnetosphere during geomagnetic disturbances has a controlling influence on the intensity of the inner magnetospheric ring current. As such, determining the time history and global distribution of outflowing flux is critical for establishing cause-and-effect connections in M-I coupling. Of the many processes that influence the upward/outward flux of escaping plasma, the density of ionospheric O+ is generally treated as a minor issue. New evidence and simulations show that this is a poor assumption. SAPS flows can direct large, localized enhancements of plasma into the vicinity of the auroral cusp. Conversely, stormtime thermospheric composition disturbances work to rapidly reduce plasma densities throughout the auroral zone. A review of recent findings and the implications for future observational campaigns will be presented.
Immel Thomas J.
Liemohn Michael W.
Mannucci Anthony J.
Ridley Aaron J.
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