HR: 16:10h
AN: SM44A-03    [Abstracts]
TI: The storm-time plasma sheet at geosynchronous orbit : CME- and CIR-dominated solar wind
AU: * Denton, M H
EM: mhdenton@lanl.gov
AF: ISR-1 Los Alamos National Laboratory, MS-D466, Los Alamos, NM 87544 United States
AU: Thomsen, M F
EM: mthomsen@lanl.gov
AF: ISR-1 Los Alamos National Laboratory, MS-D466, Los Alamos, NM 87544 United States
AU: Skoug, R M
EM: rskoug@lanl.gov
AF: ISR-1 Los Alamos National Laboratory, MS-D466, Los Alamos, NM 87544 United States
AU: Borovsky, J E
EM: jborovsky@lanl.gov
AF: ISR-1 Los Alamos National Laboratory, MS-D466, Los Alamos, NM 87544 United States
AU: Henderson, M G
EM: mghenderson@lanl.gov
AF: ISR-1 Los Alamos National Laboratory, MS-D466, Los Alamos, NM 87544 United States
AU: McPherron, R L
EM: mcpherron@igpp.ucla.edu
AF: Institute of Geophysics & Planetary Physics, University of California, Los Angeles, CA 90095 United States
AU: Pollock, C
EM: cpollock@swri.edu
AF: Southwest Research Institute, Southwest Research Institute, San Antonio, TX 78238 United States
AB: The plasma sheet provides the primary source population for the storm-time ring current, and characteristic storm signatures are produced by the plasma sheet penetrating deep into the inner magnetosphere. Geosynchronous orbit offers an excellent vantage point from which to monitor the plasma sheet population that ultimately becomes the storm-time ring current. For well over a complete solar cycle, Los Alamos has been fielding magnetospheric plasma analyzers at geosynchronous orbit, creating an extensive multi-point database of plasma sheet conditions. Previous statistical analyses of these data have revealed important information about the access that the plasma sheet has to the inner magnetosphere. More recently, we have performed superposed epoch studies of the variation of plasma sheet properties as a function of storm phase. In the current study, we examine the storm-time behaviour for storms sorted according to the likely solar wind driver, i.e., CME-driven and CIR high-speed-stream-driven, and according to the phase of the solar cycle. We compare the geosynchronous data with data from the MENA instrument on-board the IMAGE satellite to investigate the global distribution of energetic ions in the inner magnetosphere during such events.
DE: 2162 Solar cycle variations (7536)
DE: 2736 Magnetosphere/ionosphere interactions
DE: 2740 Magnetospheric configuration and dynamics
DE: 2784 Solar wind/magnetosphere interactions
DE: 7536 Solar activity cycle (2162)
SC: SPA-Magnetospheric Physics [SM]
MN: 2005 Joint Assembly