HR: 0800h
AN: SM11A-0324    [Abstracts]
TI: Energetic Ion Bursts and Associated Polar Rain Electron Flux Enhancements During Magnetic Cloud Passage: A WIND-POLAR-DMSP Study
AU: Sandholt, P
EM: p.e.sandholt@fys.uio.no
AF: Department of Physics, University of Oslo, 1048 Blindern, Oslo, N-0316, Norway
AU: * Farrugia, C
EM: charlie.farrugia@unh.edu
AF: Space Science Center and Department of Physics, University of New Hampshire, College Rd, Durham, NH 03824, United States
AU: Sharma, A
EM: arvind.sharma@fys.uio.no
AF: Department of Physics, University of Oslo, 1048 Blindern, Oslo, N-0316, Norway
AB: We present correlated Wind-Polar -DMSP observations of precipitation features in the northern, summer polar cap obtained during the passage of the sheath region of an interplanetary magnetic cloud. The sheath was characterized by an strong magnetic field whose direction spanned a wide range of orientations. Distinct field and flow discontinuities allow us to interpret a series of energetic (maximum E ~20 kV) ion bursts, flowing predominantly against the field direction and which are accompanied by enhanced polar rain electron fluxes. The underlying convection pattern is inferred from DMSP passes. Generating mechanisms involving overdraped lobe/dual reconnection are examined in the light of the observations.
DE: 2431 Ionosphere/magnetosphere interactions (2736)
DE: 2435 Ionospheric disturbances
DE: 2475 Polar cap ionosphere
DE: 2760 Plasma convection (2463)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting