Role of magnetospheric convection and precipitation in the formation of the "dusk effect" during the main phase of a magnetic storm

Details Role of magnetospheric convection and precipitation in the formation of the "dusk effect" during the main phase of a magnetic storm Role of magnetospheric convection and precipitation in the formation of the "dusk effect" during the main phase of a magnetic storm

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ge%26ae..51..468t&link_type=abstract

Geomagnetism and Aeronomy, Volume 51, Issue 4, pp.468-474

Physics

Scientific paper

This paper studies the role of magnetospheric factors, such as convection and energetic electron precipitation during the formation of positive disturbances in the total electron content under the conditions of the summer evening ionosphere. À numerical model of the ionosphere and plasmasphere, where time variations in the magnetospheric convection velocity and electron precipitation parameters correspond to the main phase of a magnetic storm, has been used for this purpose. It has been indicated that the total electron content sharply increases (the "dusk effect") in the eastern and western sectors at approximately the same geomagnetic latitudes corresponding to the subauroral zone provided that a sudden storm commencement is registered in the morning hours. local time. This peak of the total electron content is formed as a result of joint reconstruction of the magnetospheric convection pattern and energetic electron precipitation during the main phase of a storm. In this case, magnetospheric convection plays the main role, raising the F2 layer by 40-80 km into the region with a lower recombination rate.

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