Magnetic storm effects on the tropical ultraviolet airglow

Details Magnetic storm effects on the tropical ultraviolet airglow Magnetic storm effects on the tropical ultraviolet airglow

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.1126g&link_type=abstract

Journal of Geophysical Research, vol. 82, Mar. 1, 1977, p. 1126-1136.

Physics

1

Airglow, Geomagnetism, Magnetic Storms, Night Sky, Tropical Regions, F Region, Latitude, Luminous Intensity, Magnetic Anomalies, Ogo-4, Oxygen Spectra

Scientific paper

Ogo 4 measurements of the UV equatorial airglow made during a period which included a major magnetic storm are analyzed and used as an indicator of wind direction and velocity as well as ExB drift magnitude and phase. Some features of the airglow intensity and distribution are explained in terms of storm-induced changes in vertical drift velocity, neutral composition, or both. The observations are shown to be consistent with an eastward neutral wind that transports ionization from the Southern to the Northern Hemisphere while raising the F layer in the South and lowering it in the North. Theoretical modeling of the low-latitude F-region ionosphere indicates that an eastward wind with velocity approaching 300 m/s at 2100 LT can qualitatively produce the observed hemispheric asymmetries in airglow emission rates.

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