Equatorial fountain effect and dynamo drift signatures from AE-E observations

Details Equatorial fountain effect and dynamo drift signatures from AE-E observations Equatorial fountain effect and dynamo drift signatures from AE-E observations

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9521285c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Dec. 1, 1990, p. 21285-21290.

Physics

22

Diurnal Variations, Explorer 55 Satellite, F Region, Ionospheric Drift, Dynamo Theory, Ionospheric Disturbances, Vertical Distribution

Scientific paper

Vertical and horizontal ion drift velocities for 1977-1979 from the Unified Abstract files of the satellite Atmosphere Explorer E were used in preliminary studies of the behavior of the low-latitude F region. Sample diurnal variations obtained during 1978-1979 equinox time periods are very similar to those measured by the incoherent scatter radar at Jicamarca, Peru. Latitude profiles of the vector drift values clearly show the classic fountain effect responsible for the Appleton anomaly during the day. Investigation of longitude effects revealed that the average perpendicular (approximately vertical) drift velocity is independent of longitude, implying that the average east-west electric field is proportional to B and thus is likely derived from classical dynamo winds.

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