HR: 0800h
AN: SM31A-0402    [Abstracts]
TI: An observational basis for the dynamic substorm current system
AU: * Gjerloev, J W
EM: jesper.gjerloev@jhuapl.edu
AF: JHU-APL, Johns Hopkins University 11100 Johns Hopkins Road, Laurel, MD 20723-6099 United States
AU: Hoffman, R A
EM: Robert.A.Hoffman.1@gsfc.nasa.gov
AF: NASA-GSFC, NASA-Goddard Space Flight Center Laboratory for Extraterrestrial Physics Building 21, Greenbelt, MD 20771 United States
AB: We present a study of the spatial and temporal morphology of the auroral current system and its coupling to the magnetosphere during substorms using three independent approaches. From the observables we have deduced a time dependent model of the large-scale auroral electrojet system. Our model shows a westward electrojet system consisting of two quasi independent components located pre- and post-midnight at different latitudes. Emphasis will be put on the observational constrains provided by a large number of ground based magnetometers and global auroral images.
DE: 2409 Current systems (2721)
DE: 2704 Auroral phenomena (2407)
DE: 2790 Substorms
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005