Seasonal-Latitudinal Structure of the Diurnal Thermospheric Tide

摘要: Abstract The seasonal-latitudinal structure of the diurnal thermospheric tide is investigated for minimum and maximum levels solar activity by numerically solving linearized inseparable tidal equations a spherical, rotating, viscous atmosphere with anisotropic ion drag. Variations in F-region ionospheric zenith angle dependence EUV heat source are major factors controlling tide. combined interaction solar-cycle dependent background temperature profile (which controls altitude diffusion dominance) variations seasonal plasma sunspot leads to variation morphology For instance, summer-winter differences winds at given height more pronounced during SSMAX as opposed SSMIN. At level activity, westerly winds, vertical temperatures a...