HR: 0800h
AN: SM31A-0392    [Abstracts]
TI: Restructuring of Nightside Convection During Substorm
AU: * Koustov, A V
EM: sasha.koustov@usask.ca
AF: Institute of Space and Atmospheric Studies, U of Saskatchewan, 116 Science Place, Saskatoon, SK S7N 5E2 Canada
AU: Drayton, R A
EM: rad626@mail.usask.ca
AF: Institute of Space and Atmospheric Studies, U of Saskatchewan, 116 Science Place, Saskatoon, SK S7N 5E2 Canada
AU: McWilliams, K A
EM: kathryn.mcwilliams@usask.ca
AF: Institute of Space and Atmospheric Studies, U of Saskatchewan, 116 Science Place, Saskatoon, SK S7N 5E2 Canada
AU: Frey, H U
EM: hfrey@ssl.berkeley.edu
AF: Space Sciences Laboratory, University of California, 7 Gauss Way, Berkeley, CA 94720-7450
AB: Several features in the nightside convection patterns near the substrom onset time have been reported in the past. In this presentation, concurrent SuperDARN observations of plasma convection and IMAGE satellite data on global distribution of auroral luminosity are used to illustrate several effects in the convection patterns. For example, we show appearance of large-scale vortices in the dusk and dawn sectors near the onset time, their evolution and subsequent setup of enhanced plasma flows at the equatorward edge of the return dusk flows. Another focus of the study is the timing of the equatorward convection enhancements with respect to the substorm onset time.
DE: 2463 Plasma convection (2760)
DE: 2712 Electric fields (2411)
DE: 2721 Field-aligned currents and current systems (2409)
DE: 2760 Plasma convection (2463)
DE: 2790 Substorms
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005