HR: 0800h
AN: SM51B-1288    [Abstracts]
TI: Relationship between Ionospheric and Magnetospheric Plasma Flows during Northward IMF
AU: * Cumnock, J A
EM: cumnock@utdallas.edu
AF: University of Texas at Dallas, Center for Space Sciences PO Box 830688, FO22, Richardson, TX 75083-0688 United States
AU: * Cumnock, J A
EM: cumnock@utdallas.edu
AF: Alfvén Laboratory, Royal Institute of Technology, School of Electrical Engineering, Stockholm, SE-100 44 Sweden
AU: Blomberg, L G
EM: lars.blomberg@alfvenlab.kth.se
AF: Alfvén Laboratory, Royal Institute of Technology, School of Electrical Engineering, Stockholm, SE-100 44 Sweden
AB: The primary source of energy driving ionospheric convection at high latitudes is the interaction of the solar wind with the Earth's magnetosphere. The flow of the solar wind past the magnetosphere induces a large-scale electrostatic potential drop across the magnetosphere, most of which projects into the ionosphere. This drives large-scale plasma convection and currents inside the magnetosphere and ionosphere, with their magnitudes and configurations dependent on the orientation of the interplanetary magnetic field (IMF). Utilizing data from DMSP and Cluster EFW we compare ionospheric plasma velocity and precipitating particle measurements in the ionosphere to electric field measurements in the magnetotail. We map ionospheric phenomena associated with northward IMF (transpolar arcs and reverse plasma convection) to plasma flows seen in the near magnetotail. We present new observational results of the ionospheric and magnetospheric signatures of high-latitude CRBs and the evolution of the ionosphere and magnetosphere during northward IMF and changing By.
DE: 2455 Particle precipitation
DE: 2463 Plasma convection (2760)
DE: 2704 Auroral phenomena (2407)
DE: 2716 Energetic particles: precipitating
DE: 2760 Plasma convection (2463)
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005