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Semi-theoretical global models of the eddy diffusion coefficient based on satellite data |
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| Affiliation: | 1. Division of Membrane Physiology, Department of Cell Physiology, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, Japan;2. Department of Physiological Sciences, School of Life Science, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Japan;1. Faculty of Energy and Fuels, AGH University of Science and Technology, Cracow, Poland;2. Institut Jean le Rond d''Alembert, Sorbonne Université, CNRS UMR 7190, Saint Cyr l''Ecole, France;3. Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway;4. College of Chemical Engineering, Sichuan University, PR China;5. Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, PR China |
| Abstract: | Long periodic density variations of the thermospheric constituents can be described by combined variations of two parameters: exospheric temperature and turbopause height. Two global models of thermospheric composition relying on exospheric temperature and turbopause height variations were presented by the authors in a previous paper. In this paper the turbopause height changes and their interpretation in terms of the eddy diffusion coefficient are discussed. The determination of the eddy diffusion coefficient is not unique as some assumptions have to be made with respect to the shape of the height profile of the eddy diffusion coefficient. Two models are presented: one for a height independent and one for a height dependent profile of the eddy diffusion coefficient. The models are discussed and compared with other results. |
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