Height dependence of spread F bubble drift velocities

Details Height dependence of spread F bubble drift velocities Height dependence of spread F bubble drift velocities

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.7107h&link_type=abstract

Journal of Geophysical Research, vol. 84, Dec. 1, 1979, p. 7107-7112.

Physics

Bubbles, Equatorial Atmosphere, Spread F, Atmospheric Models, Drift Rate, Height, Very High Frequency Radio Equipment

Scientific paper

Vertical bubble velocities in equatorial spread F have been investigated analytically by Ott (1978), Osakow and Chaturvedi (1978), all of whom found a proportionality of the vertical velocity to bubble depletion density. The paper presents radar data from two equatorial sites which support theoretical predictions that vertical drift velocities of spread F bubbles increase with height on the bottomside of the F layer. This increase is shown to result from the proportionality of bubble drift velocity to density depletion amplitude, which itself increases with height. The measured rate of increase is found to be dU/dh equals about 2 m/s km. It is concluded that this is consistent with numerical simulation results within a factor of 2.

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