Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa44a..03g&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SA44A-03
Other
2411 Electric Fields (2712), 2431 Ionosphere/Magnetosphere Interactions (2736), 2439 Ionospheric Irregularities, 2441 Ionospheric Storms (7949), 2788 Magnetic Storms And Substorms (7954)
Scientific paper
The Wallops SuperDARN radar has now been in operation for more than one year and has obtained a virtually continuous record of the state of the subauroral ionosphere in the vicinity of the northeastern U.S. and maritime Canada. For several of the storm intervals that have occurred, there have been expanded oval configurations during which large electric fields and plasma flows have expanded as far south as the Middle Atlantic States. There have also been numerous examples of Sub-Auroral Ionization Drifts (SAIDs) that have been recorded and compared with measurements from the DMSP, NOAA POES and TIMED satellites. One of the interesting features of SAID measurements with the Wallops radar is the ability of the radar to obtain multi-hour records of the latitude and maximum plasma drift speed within the SAID flow channel. While the ionospheric flow velocity is often at low values (less than 50 m/s) equatorward of the SAID, there are periods when these values can become much larger. Some of these periods are transient in nature and appear to be related to substorms, but others are more enduring. It is not entirely clear what process or processes lead to these enduring increases in the electric field. In this presentation, examples from each of these types of subauroral electric fields will be reviewed and discussed.
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