Effect of the electron temperature in the electron number density and dynamics of the equatorial E-region

Details Effect of the electron temperature in the electron number density and dynamics of the equatorial E-region Effect of the electron temperature in the electron number density and dynamics of the equatorial E-region

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35....1d&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 35, Jan. 1987, p. 1-9.

Statistics

Computation

1

E Region, Electron Energy, Equatorial Atmosphere, Ionospheric Electron Density, Current Density, Equatorial Electrojet, Ionospheric Conductivity, Temperature Effects

Scientific paper

The electron rate of recombination and collision frequency of electrons with neutrals depend on the electron temperature, which is, at E-region heights, greater than the neutral temperature even for geomagnetically quiet conditions; therefore, in order to perform theoretical computations of electron number and electric current densities, the usual hypothesis that both temperatures are equal at those heights is removed in the present paper. Instead, an empirical model of E-region electron temperature is used, and all the data were carefully selected so that they correspond to equivalent ionospheric and solar conditions. It is found that the electron number density depends strongly on the electron temperature, being well predicted by the present model; the shape of the vertical profile of the electrical conductivity is mainly determined by the electron number density profile, and the shape of the vertical current density thus calculated is in good agreement with the measured one. At the dip equator, a discrepancy between the intensity of the measured and computed current densities around the height of the electrojet peak still remains, which could be due to an anomalous reduction of the electric field there, as is suggested by the agreement found a few degrees beyond the dip.

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