A study of high-latitude E-field patterns using simple models with day-night ionospheric conductivity gradient

Details A study of high-latitude E-field patterns using simple models with day-night ionospheric conductivity gradient A study of high-latitude E-field patterns using simple models with day-night ionospheric conductivity gradient

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986p%26ss...34...59s&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 34, Jan. 1986, p. 59-68. Research supported by Beijing University.

Computer Science

3

Atmospheric Electricity, Ionospheric Conductivity, Polar Regions, Auroral Zones, Current Distribution, Electric Fields, Equipotentials, Field Aligned Currents, Particle Precipitation

Scientific paper

Simple models with the effect of the day-night ionospheric conductivity gradient are used to discuss the high-latitude convective electric field pattern. The exponential functions exp(-x/L) is used to express the day-night variation in conductivity. Three types of models are used in this work: (1) the electropotential distribution is a sine function at the polar cap boundary if the effects of region-2 field-aligned current and the conductivities enhancement within the auroral zone are neglected; (2) with two regions of field-aligned currents, and without conductivity enhancement in the auroral zone; and (3) both the two regions of field-aligned currents and the enhancement of conductivity within the auroral zone are taken into account. The comparison between the different models helps in understanding the convective pattern under different geomagnetic conditions. It also shows the combined effects of the field-aligned currents and the variation of the conductivities (both the day-night gradient and the enhancement within the auroral zone).

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