HR: 0830h
AN: SA21B-0080    [PDF]
TI: Large-scale Structure of Equatorial Plasma Depletions, With Implications for Seed Populations
AU: * Hei, M A
EM: matthei@utdallas.edu
AF: University of Texas at Dallas, Dept. of Physics, MS/FO 22 PO Box 830688, Richardson, TX 75083-0688 United States
AU: Heelis, R A
EM: heelis@utdallas.edu
AF: University of Texas at Dallas, Dept. of Physics, MS/FO 22 PO Box 830688, Richardson, TX 75083-0688 United States
AU: McClure, J P
EM: mcclure@utdssa.utdallas.edu
AF: University of Texas at Dallas, Dept. of Physics, MS/FO 22 PO Box 830688, Richardson, TX 75083-0688 United States
AB: There is mounting evidence that the seed perturbations, which initiate bubble formation, may directly influence large-scale depletion features, and may also account for some of the observed variations in seasonal and longitudinal (s/l) bubble occurrence. While previous scintillation and in-situ studies have examined occurrence frequency patterns, they do not readily isolate the effect of seeds. We characterize pre-midnight depletion regions here in terms of their large-scale properties of width, depth, and spacing. Our results demonstrate that large-scale bubble features vary significantly with longitude and season, and point to a similar variation in seed properties.
DE: 2415 Equatorial ionosphere
DE: 2439 Ionospheric irregularities
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting