HR: 14:00h
AN: SA32A-02    [PDF]
TI: Studies on the Coupling Between the Neutral Winds and the Ionosphere at Low Latitudes
AU: * Talaat, E R
EM: elsayed.talaat@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: DeMajistre, R
EM: bob.demajistre@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Paxton, L
EM: larry.paxton@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Crowley, G
EM: gcrowley@swri.edu
AF: Southwest Research Institute Space Sciences and Engineering, 6220 Culebra Road, San Antonio, TX 78228 United States
AU: Kil, H
EM: hyosub.kil@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Yee, J
EM: sam.yee@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Azeem, S
EM: azeem71d@erau.edu
AF: Embry-Riddle Aeronautical University Physical Sciences Department, 600 S. Clyde Morris Boulevard, Daytona Beach, FL 32119
AU: Christensen, A
EM: Andrew.B.Christensen@aero.org
AF: Aerospace Corporation, Space and Environ. Tech. Center P.O. Box 92957, Los Angeles, CA 90009 United States
AU: Roble, R
EM: roble@ucar.edu
AF: NCAR High Altitude Observatory, 3450 Mitchell Lane, Boulder, CO 80301 United States
AB: The Appleton anomaly is caused by the upward E x B drift of the equatorial ionospheric plasma and subsequent diffusion along magnetic field lines to lower altitudes at higher latitudes. The strength and location of the Appleton anomaly has been thought to be controlled mainly by the interaction of the neutral winds with the electric and magnetic fields. Variability can arise from different geophysical processes affecting the neutral dynamics and the background electric/magnetic fields. In addition, ion drag from the differing densities between the two peaks of the anomaly can induce hemispheric differences in the zonal wind circulation. Recent global observations of the low latitude ionospheric structure revealed by TIMED/GUVI, TOPEX, and DMSP allow us to investigate the interplay between the neutral, plasma, and background fields. In this paper we will examine both satellite and groundbased measurements and interpret the findings using a global thermospheric/ionospheric model.
DE: 0335 Ion chemistry of the atmosphere (2419, 2427)
DE: 2411 Electric fields (2712)
DE: 2423 Ionization mechanisms
DE: 2435 Ionospheric disturbances
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting