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Coupled Barium Cloud-Ionosphere Systems. 3. Neutral Wind Effects in the Small Cloud Approximation.
NAVAL RESEARCH LAB WASHINGTON D C
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The nonlinear motion of a small F-region barium release electrostatically coupled to the E-region is studied in the presence of a neutral wind with differing values for the E- and F-regions. In a reference frame with the E-region neutral wind, an F-region neutral wind transverse to the background E sub 0 field is shown to retard or accelerate the evolution of the cloud without otherwise altering the development of the system. When the relative neutral wind has a component parallel to the background E sub 0 field, there is also a change in the direction of the axis of elongation of the cloud as a function of time, although the final direction is independent of the relative neutral wind. Barium cloud and image behavior are shown to be substantially identical for periodic and Dirichlet boundary conditions.
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