TitlePlasma transport process in the equatorial/low-latitude ionosphere
Publication TypeJournal Article
Year of Publication2019
AuthorsAdebesin, BOlufemi, Adekoya, BJohn, David, TWemimo
JournalAdvances in Space Research
Volume63
Issue5
Pagination1619 - 1633
Date Published03/2019
ISSN02731177
Abstract

The behaviour of the equatorial/low-latitude ionosphere and the transport processes during magnetic disturbed and quiet periods of a high solar activity year, 2014, in the American sector are investigated. Parameters used include vertical drift (Vz), transport term (W), NmF2, hmF2 and scale-height (H). The F2 plasma variations followed the diurnal local solar pattern, being higher at daytime. The sunset maximum and sunrise minimum peaks of hmF2 were directly opposite to the scale height (H) pattern. The plasma distribution was basically controlled by combined actions of the electrodynamic convection/thermospheric composition, which is geomagnetic activity dependent. The annual, semi-annual and winter-anomalies of the F2 parameters were higher at the dip equator in comparison with the low-latitude. The Vz pre-reversal peak magnitude coincided with hmF2 peak and the effects are more pronounced during geomagnetic disturbed conditions. The transport term pattern was similar to that of the scale height and it is suggested as a proxy parameter for quantifying low-latitude plasma irregularities and distribution of thermospheric composition.

URLhttps://linkinghub.elsevier.com/retrieve/pii/S0273117718308676
DOI10.1016/j.asr.2018.11.013
Short TitleAdvances in Space Research


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