O I 630. 0-nm dayglow in the region of equatorial ionization anomaly: Temporal variability and its causative mechanism

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/92JA00674· OSTI ID:6912764

Sridharan, R; Haider, S A; Gurubaran, S; Sekar, R; Narayanan, R ^[1]

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1. Physical Research Lab., Ahmedabad (India)

Results of the continuous measurements of O I 630.0-nm dayglow from Mount Abu (20[degree] 20' N dip latitude), a station in the region of equatorial ionization anomaly (EIA) by means of a recently developed ground-based dayglow photometer are presented. The measurements on magnetically quiet and moderately active days reveal that there are strong noontime bite-outs in 630.0-nm intensities. The temporal variabilities in the intensities show a good correlation with those in electron densities in the lower F region over Ahmedabad (18[degree] 23' N dip latitude) with a time delay of 1 hour. Theoretical estimation of the intensities indicates that the dissociative recombination of O[sup +][sub 2] with ambient electron is mainly responsible for the observed temporal variability in the dayglow emission. The time delay between the theoretically evaluated and the measured noontime bite-outs is discussed in the context of the development of the EIA.

• OSTI ID: 6912764
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 97:A9; ISSN JGREA2; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIRGLOW
CHARGED PARTICLES
COLLISIONS
EARTH ATMOSPHERE
ELECTRON COLLISIONS
ELECTRON DENSITY
EMISSION SPECTRA
F REGION
IONOSPHERE
IONS
MEASURING INSTRUMENTS
OXYGEN IONS
PHOTOMETERS
PLANETARY IONOSPHERES
RECOMBINATION
REMOTE SENSING
SPECTRA
THERMOSPHERE
VARIATIONS