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F-region plasma distribution seen from TIMED/GUVI and its relation to the equatorial spread F activity
Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
The OI 135.6-nm nightglow images from GUVI on board the TIMED satellite provide a unique opportunity to investigate the global plasma distribution in the F region. We report that there exist large seasonal-longitudinal variations in the F-region plasma density which may explain some aspects of the equatorial spread F (ESF) morphology. We suggest that an occurrence of high plasma density is responsible for the strong ESF activity during equinox periods at most longitudes, whereas an occurrence of low plasma density is responsible for the suppressed ESF activity during northern summer in the American-Atlantic sector.
Received 24 September 2003; accepted 10 February 2004; published 10 March 2004.
Citation: (2004), F-region plasma distribution seen from TIMED/GUVI and its relation to the equatorial spread F activity, Geophys. Res. Lett., 31, L05810, doi:10.1029/2003GL018703.
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