North-south asymmetry in the ionospheric equatorial anomaly in the African and the West Asian regions produced by asymmetrical thermospheric winds

Details North-south asymmetry in the ionospheric equatorial anomaly in the African and the West Asian regions produced by asymmetrical thermospheric winds North-south asymmetry in the ionospheric equatorial anomaly in the African and the West Asian regions produced by asymmetrical thermospheric winds

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50..623a&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 50, July 1988, p. 623-627.

Physics

4

Asymmetry, Equatorial Regions, Ionospheric Currents, Thermosphere, Wind Profiles, F Region, Ionospheric Electron Density

Scientific paper

The effect of asymmetrical thermospheric winds on NmF2 at the dip I = 30 deg and its magnetic conjugate point have been computed for equinox conditions to study asymmetry in the ionospheric equatorial anomaly in the African and West Asian regions. The wind models of Ill et. (1975) and Chan and Walker (1984) have been used in the computations. During the daytime, due to the winds, NmF2 in the northern crest becomes greater than NmF2 in the southern crest; at night the reverse is true in both regions. It is shown that the observed asymmetry in NmF2 at the equatorial crest in the African sector can be well explained by considering the effects of asymmetrical winds with respect to those in the West Asian sector.

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