Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm21b0536s&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SM21B-0536
Physics
2407 Auroral Ionosphere (2704), 2409 Current Systems (2708), 2431 Ionosphere/Magnetosphere Interactions (2736), 2455 Particle Precipitation, 2463 Plasma Convection
Scientific paper
Shue et al. [2002] reported that an auroral feature, which is called the two-cell aurora, was identified from Polar Ultraviolet Imager auroral images. The characteristics of the two-cell aurora are azimuthal elongation over extended local times with gaps at noon and midnight. Its electrodynamic association with the convection, particle precipitation, and field-aligned currents has not been fully understood. In conjunctions with DMSP F12 spacecraft on the duskside branch of the aurora, we are able to investigate the association of auroral emissions with convection reversals, upward field-aligned currents, and energy fluxes and average energy of particles. It is found that the location of the convection reversal is colocated with the upward field-aligned currents. The maximum auroral emissions occur at or poleward of the convection reversals. The energy flux and average energy derived from auroral images are consistent with observations from DMSP in a region mapped to the plasma sheet. However, inconsistency occurs in a region mapped to the plasma sheet boundary layer. Shue, J.-H., P. T. Newell, K. Liou, C.-I. Meng, Y. Kamide, and R. P. Lepping, Two-component auroras, Geophys. Res. Lett., 29(10), 10.1029/2002GL14657, 2002.
Germany Glynn A.
Hairston Marc R.
Liou Kan
Meng Chun
Newell Patrick T.
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