On the diurnal variations of total mass density,number density and temperature in the upper thermosphere |
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| Authors: | RJ Moffett |
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| Institution: | Department of Applied Mathematics, and Computing Science, University of Sheffield, Sheffield S10 2TN, England |
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| Abstract: | Theoretical work on the time of occurrence of the diurnal maxima of total mass density (?), number densities (n) and temperature (T) in the upper thermospheric region is discussed. It is suggested that the observed ρ-T phase difference is due to the neutral air wind acting as a heating or cooling agent and to variations in n and T at the lower boundary of the region. The observed n(O)-n(N2)-T phase differences may be caused by vertical diffusion of atomic oxygen through molecular nitrogen and by variations in n and T at the lower boundary. |
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