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Differential equation of exospheric lateral transport and its application to terrestrial hydrogenThe differential equation description of exospheric lateral transport of Hodges and Johnson is reformulated to extend its utility to light gases. Accuracy of the revised equation is established by applying it to terrestrial hydrogen. The resulting global distributions for several static exobase models are shown to be essentially the same as those that have been computed by Quessette using an integral equation approach. The present theory is subsequently used to elucidate the effects of nonzero lateral flow, exobase rotation, and diurnal tidal winds on the hydrogen distribution. Finally it is shown that the differential equation of exospheric transport is analogous to a diffusion equation. Hence it is practical to consider exospheric transport as a continuation of thermospheric diffusion, a concept that alleviates the need for an artificial exobase dividing thermosphere and exosphere.
Document ID
19740029884
Document Type
Reprint (Version printed in journal)
Authors
Hodges, R. R., Jr. (Texas, University Dallas, Tex., United States)
Date Acquired
August 7, 2013
Publication Date
November 1, 1973
Publication Information
Publication: Journal of Geophysical Research
Volume: 78
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NGL-44-004-026
Distribution Limits
Public
Copyright
Other