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Volume 61 Supplement 4

Special Issue: Coupling Processes in the Equatorial Atmosphere (CPEA)

Electrodynamics of the vertical coupling processes in the atmosphere-ionosphere system of the low latitude region

Earth, Planets and Space volume 61, pages 385–395 (2009)Cite this article

Abstract

Dynamical, electro-dynamical and electrical coupling processes originating from upward propagation of atmospheric waves, and magnetosphere-ionosphere interaction are responsible for the large degree of variabilities observed in the low latitude ionosphere. One of the most outstanding aspects of its phenomenology is related to the sunset electrodynamical processes responsible for the evening enhancements in zonal and vertical electric fields and the associated spread of F/plasma bubble irregularity development. Recent observational results have provided evidence of significant contribution to their quiet time variability arising from thermospheric wind patterns, upward propagating planetary waves and possibly sporadic E layers. This paper provides an overview and some new results on planetary wave coupling with the equatorial F region, the E layer conductivity as key connecting mechanism, a possibly interactive role by sporadic E layers, and the resulting day-to-day variability in the evening prereversal electric field enhancements with consequences on spread F development.

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  1. Instituto Nacional de Pesquisas Espaciais, INPE, São José dos Campos, SP, Brazil

    M. A. Abdu & C. G. M. Brum

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  1. M. A. Abdu
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  2. C. G. M. Brum
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Correspondence to M. A. Abdu.

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Abdu, M.A., Brum, C.G.M. Electrodynamics of the vertical coupling processes in the atmosphere-ionosphere system of the low latitude region. Earth Planet Sp 61, 385–395 (2009). https://doi.org/10.1186/BF03353156

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