Effects of neutral gas motions on midlatitude E region irregular structure

Details Effects of neutral gas motions on midlatitude E region irregular structure Effects of neutral gas motions on midlatitude E region irregular structure

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jastp..64.1479k&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 64, Issue 12-14, p. 1479-1486.

Physics

4

Scientific paper

This paper discusses the physical nature of neutral wind-induced processes. A simple ``pictorial'' explanation of the neutral-wind-driven gradient drift and thermal instabilities, originally suggested by Kagan and Kelley (Geophys. Res. Lett. 25 (1998) 4141; J. Geophys. Res. 105 (2000) 5291), is developed for the first time. A formula for the growth rate of a neutral-wind-driven gradient drift instability applicable for an arbitrary latitude is presented. The effectiveness of the neutral wind approach to the problem of midlatitude backscatter in the ionospheric E region is discussed. The paper concludes that there are cases when one may experimentally distinguish between electric field- and neutral wind-driven processes and shows that the backscatter character is defined by either the neutral behavior or the structure of ionization clouds but not by the gradient drift process itself.

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