Physics
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.2205s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A2, p. 2205-2213
Physics
39
Electric Fields, Equatorial Atmosphere, F Region, Magnetohydrodynamic Stability, Spread F, Taylor Instability, Computerized Simulation, Plasma Density, Two Dimensional Models, Vertical Distribution, Zonal Flow (Meteorology)
Scientific paper
In view of the present understanding of Equatorial Spread F (ESF) through the generalized Rayleigh-Taylor instability mechanism, the importance of dynamical parameters is examined by means of a nonlinear numerical simulation technique. The investigation reveals that agencies like downward wind and eastward electric field of measured magnitudes accelerate the evolutionary process of ESF even beyond 350 km height, where according to the linear theories they are considered to be less significant. It is also shown that the acceleration must be due to the presence of in-situ winds or electric fields. The variabilities in the occurrence characteristic of ESF are discussed in connection with the possible day-to-day variabilities of vertical winds.
Raghavarao R.
Sekar R.
Suhasini R.
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