Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm23b1713s&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM23B-1713
Physics
2431 Ionosphere/Magnetosphere Interactions (2736), 2723 Magnetic Reconnection (7526, 7835), 2724 Magnetopause And Boundary Layers, 2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail
Scientific paper
Steady Magnetospheric Convection designates a state of the magnetosphere where substorm activity is absent despite sustained electromagnetic power delivered by the solar wind. FAST and POLAR measurements of a collection of SMCs observed in the early years of these missions show that the magnetosphere is significantly mass-loaded as a result of extended periods of sustained ion outflow from a wide range of latitudes. The increase in the inertia of the magnetospheric plasma can hinder reconnection in the magnetotail, thus inhibiting substorm triggering, or reconnection in the dayside magnetopause, thus inhibiting magnetic flux transfer into the magnetosphere. It is observed that magnetospheric "bubbles" (flux tubes of rarefied plasma sheet) prompt the extraction of ions from the ionosphere and are responsible for a non-negligible fraction of the total ion outflow. Bubbles are tracked using the ionospheric footprint of rarefied flux tubes and the optical signature of their boundaries.
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