Vertical motions in the thermosphere over Mawson,Antarctica |
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| Institution: | 1. Lodz University of Technology, Institute of Polymer and Dye Technology, Stefanowskiego 16, 90-537 Lodz, Poland;2. Medical University of Lublin, Independent Unit of Tissue Engineering and Regenerative Medicine, Chair of Biomedical Sciences, Chodzki 1 Street, 20-093 Lublin, Poland;3. Carnegie Mellon University, Department of Chemistry, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA |
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| Abstract: | High time resolution measurements of Doppler shift and broadening of the (OI) >1630 nm emission in the night airglow and aurora have provided determinations of vertical velocities and temperatures in the neutral thermosphere over Mawson, Antarctica. The vertical wind exhibits a large, rapid and complex response to geomagnetic energy input. Upward winds greater than 50 m s−1 are frequently associated with the expansion phase of auroral substorms. Following the disturbance, prolonged periods of downward winds produce temperature enhancements of 200K outside the source region, thus providing a mechanism for the redistribution of geomagnetic energy. Oscillatory behaviour consistent with thermospheric gravity waves is observed during both quiet and disturbed conditions. |
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