Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm54a..01b&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SM54A-01
Physics
2712 Electric Fields (2411), 2736 Magnetosphere/Ionosphere Interactions, 2740 Magnetospheric Configuration And Dynamics, 2760 Plasma Convection, 2776 Polar Cap Phenomena
Scientific paper
In a previous study [Bristow et al., 2004], SuperDARN estimates of the cross-polar-cap potential (CCP) were compared to the variability that would be expected from the observed interplanetary magnetic field (IMF). The study showed that there was approximately twice as much variability as would be predicted using empirical formulae relating the CCP to the IMF. This study extends the earlier work by examining SuperDARN velocity estimates averaged over local time - latitude sectors. The distributions of observed velocities are examined, as are correlations between the velocity observations and the CCP estimates. As would be expected, it is found that the velocity distributions are broadest near noon and midnight. Also, it is found that variations in the CCP can be linked to localized velocity surges.
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