Thermospheric temperature during a high solar activity period



Previous measurements and associated theoretical studies have indicated that the polar region has a critical role in the overall thermospheric dynamics due to the convergent geometry of the ion convection near the dayside auroral zone and the dominant importance of ion drag forcing the thermospheric momentum balance. The King Sejong Station (geographic: 62.22°S, 301.25°E; geomagnetic: 50.65°S, 7.51°E), which is the Korean Antarctic Research Station, was established on King George Island, Antarctica, in 1988 and is strategically located for an optical investigation of the Southern Hemisphere thermosphere. It is a high-latitude station geographically, but a middle-latitude station geomagnetically; it is therefore subject to unusual varieties of driving forces and a different combination of geographically and geomagnetically related dynamic and thermodynamic elements [Smith et al., 1988]. For this reason, it is a critical station in evaluating the validity of model predictions of the temperatures and winds in the thermosphere of the Southern Hemisphere.