Semiannual variation in the heterosphere: A reappraisal
作者： L. G. Jacchia
关键词: Atmospheric temperature 、 Physics 、 Diurnal temperature variation 、 Spurious relationship 、 Sunspot 、 Atmospheric models 、 Ionosphere 、 Amplitude 、 Atmospheric sciences 、 Solar cycle 、 Earth-Surface Processes 、 Ecology (disciplines) 、 Earth and Planetary Sciences (miscellaneous) 、 Space and Planetary Science 、 Palaeontology 、 Forestry 、 Aquatic science 、 Atmospheric Science 、 Soil science 、 Geochemistry and Petrology 、 Geophysics 、 Oceanography 、 Water Science and Technology
摘要: Past attempts to represent the semiannual density variation in heterosphere as a consequence of temperature have run into difficulties two height regions: below 200 and above 1000 km. The main argument favor variations was dependence their amplitude on solar cycle; it can be shown, however, that this is spurious, being caused by change dρ/dT with T. An analysis at different levels fails show sunspot cycle. All are removed if we assume not direct variations.
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