Vertical neutral wind in the equatorial F-region deduced from electric field and ion density measurements

Details Vertical neutral wind in the equatorial F-region deduced from electric field and ion density measurements Vertical neutral wind in the equatorial F-region deduced from electric field and ion density measurements

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jatp...57..645l&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 57, no. 6, p. 645-651

Physics

4

Diurnal Variations, Electric Fields, Equatorial Regions, F Region, Ion Density (Concentration), Vertical Air Currents, Wind Velocity, Airglow, Altitude, Atmospheric Models, Charged Particles, Momentum, Plasma Bubbles, San Marco Satellites

Scientific paper

Direct current (DC) electric field and ion density measurements near density depletion regions (that is, equatorial plasma bubbles) are used to estimate the vertical neutral wind speed. The measured zonal electric field in a series of density depletions crossed by the San Marco D satellite at 01.47-01.52 Universal Time (UT) on 25 October 1988, can be explained if a downward neutral wind of 15-30 m/s exists. Simultaneously, the F-region plasma was moving downward at a speed of 30-50 m/s. These events appear in the local time sector of 23.00-23.15 in which strong downward neutral winds may occur. Indeed, airglow measurements suggest that downward neutral velocities of 25-50 m/s are possible at time near midnight in the equatorial F-region.

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