HR: 17:30h
AN: SM54A-07    [Abstracts]
TI: An investigation of ion upwelling on September 25, 1998
AU: * Germany, G A
EM: germanyg@email.uah.edu
AF: Center for Space Plasma and Aeronomic Research, S101 Technology Hall University of Alabama in Huntsville, Huntsville, AL 35899 United States
AU: Wilson, G R
SM54A-07 AF: ATK Mission Research, 589 W. Hollis St. Suite 201, Nashu, NH 03062 United States
AU: Deverapalli, C
SM54A-07 AF: Center for Space Plasma and Aeronomic Research, S101 Technology Hall University of Alabama in Huntsville, Huntsville, AL 35899 United States
AB: The 24-25 September 1998 geomagnetic storm resulted in ionospheric outflows from dayside magnetic local times that were observed by FAST and Polar. Studies of this event at FAST altitudes have attempted to determine the relative contribution of Poynting flux and electron precipitation as sources of the ion outflows. However, at these altitudes there is no information on potential ion upwelling at ionospheric altitudes or on the relative partitioning between Joule heating and electron heating of the ionosphere. We examine topside ion upflows using DMSP drift meter and SSJ4 energy data from 4 DMSP satellites (F11, F12, F13, F14; ~830 km) along with Polar UVI auroral images that provide a global frame of reference and time history. Poynting flux and electron energetics are estimated from the DMSP data. The combined data set allows us to investigate the relationship between auroral intensity/history/form/substorm-phase and the corresponding ionospheric upflow response.
DE: 2437 Ionospheric dynamics
DE: 2704 Auroral phenomena (2407)
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005