Computed bounds on the F-region zonal wind during Joule heating

Details Computed bounds on the F-region zonal wind during Joule heating Computed bounds on the F-region zonal wind during Joule heating

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jatp...40.1123b&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 40, Oct.-Nov. 1978, p. 1123-1130.

Physics

F Region, Incoherent Scattering, Ionospheric Propagation, Resistance Heating, Thermosphere, Winds Aloft, Atmospheric Models, Boundaries, Conductive Heat Transfer, Daytime, Ionic Mobility, Vertical Distribution, Wind Velocity Measurement

Scientific paper

A method was derived in previous work that allows the computation from incoherent scatter data of upper and lower bounds on the thermospheric temperature and zonal wind speed during Joule heating. The theory is derived here more rigorously, and an approximation is made to include the effects of vertical heat conduction in the upper bound. For illustrative purposes, the resulting bounds are computed using two sets of experimental data. Including conduction markedly decreases the upper bound in neutral temperature from that found without conduction. In the examples shown the average difference between zonal wind upper and lower bounds with conduction is found to be 12%, whereas without conduction it is over 40%. Because of the simplifying approximations made, the technique provides an estimate of the zonal wind only under specialized conditions. However, the results are useful because they can be interpreted to apply generally to the motion of the sunlit F-region thermosphere.

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