Structural features of the subauroral ionosphere during the origination of the polarization jet

Autor: A. E. Stepanov, V. L. Khalipov, E. D. Bondar, V. I. Popov, Innokentiy Golikov
Rok vydání: 2011
Předmět:
Zdroj: Geomagnetism and Aeronomy. 51:633-639
ISSN: 1555-645X
0016-7932
DOI: 10.1134/s0016793211050136
Popis: Narrow jets of rapid westward ion drifts were registered near the plasmapause projection at the F-region altitudes on the Cosmoc-184 satellite and were called “a polarization jet.” In this work, the effect of this polarization jet on the ionospheric structure has been studied, using a three-dimensional model of the high-latitude ionosphere, when strong local magnetospheric electric fields were originated. The calculations indicated that a narrow trough in the latitudinal variations in the electron density at the F-region maximum was formed in the zone where the electric field was switched on. This trough was more pronounced in the early evening hours, when the electron background density was still high, and was less distinct at low back-ground levels during premidnight hours. A comparison of the calculations and experimental data indicated that they were in good agreement with one another, which made it possible to state that the polarization jet was the main mechanism by which narrow electron density troughs were formed in the subauroral ionosphere.
Databáze: OpenAIRE
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