Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm12a..02s&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM12A-02
Other
2431 Ionosphere/Magnetosphere Interactions (2736), 2704 Auroral Phenomena (2407), 2706 Cusp, 2736 Magnetosphere/Ionosphere Interactions (2431)
Scientific paper
Previous studies of ionospheric outflows at ~4000 km altitude using data from the Fast Auroral Snapshot Small Explorer (FAST) have shown that the ion flux is correlated with precipitating electron density and quasi- DC Poynting flux. The FAST correlation analysis was purely data-based. In particular the study did not investigate how the energy inputs, including waves, controlled the various parameters of the ionospheric outflow. Such distinct parameters include ion density, ion velocity, and temperature. Physics-based simulation models for ionospheric plasma outflows, such as the UT Arlington Dynamic Fluid Kinetic (DyFK) model, on the other hand, explicitly investigate the outflow properties versus varying wave and precipitation driving agent parameters. Here we present a re-analysis of the FAST data that investigates the dependence of these additional ion parameters on the energy inputs. We find, for example, that the FAST observed ion temperatures are more strongly correlated with electromagnetic energy flux than precipitating electron density, a result which is consistent with the results of the DyFK modeling.
Horwitz James L.
Strangeway Robert J.
Zeng Weifei
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