Earth's equatorial ionosphere and the heliospheric current sheet.

Details Earth's equatorial ionosphere and the heliospheric current sheet. Earth's equatorial ionosphere and the heliospheric current sheet.

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986em%26p...35...85s&link_type=abstract

Earth, Moon and Planets, Volume 35, Issue 1, pp.85-91

Physics

Earth Ionosphere:Heliosphere, Earth Ionosphere:Solar Activity, Earth Ionosphere:Sunspots, Heliosphere:Earth Ionosphere, Solar Activity:Earth Ionosphere, Sunspots:Earth Ionosphere

Scientific paper

Evidence is presented to show that during epochs of high sunspot activity, the duration of manifestation of equatorial spread-F (ESF) irregularities in the Earth's equatorial ionosphere undergoes a systematic modulation around the times of crossing of the heliospheric current sheet by the Earth. The modulation which is assessed as an indirect and ‘geomagnetic activity-associated effect’, is characterised by an enhancement in the duration of ESF conditions prior to the current sheet crossing and a reduction thereafter. It is suggested that the observed response of the equatorial ionosphere to the current sheet passage is primarily a manifestation of the geomagnetic activity related modifications in the equatorial east-west electric field in the post-sunset period.

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