Vertical motions in the thermosphere over Mawson, Antarctica

Details Vertical motions in the thermosphere over Mawson, Antarctica Vertical motions in the thermosphere over Mawson, Antarctica

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jatp...48..289w&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 48, March 1986, p. 289-292.

Physics

26

Airglow, Antarctic Regions, Atmospheric Circulation, Thermosphere, Vertical Motion, Atmospheric Temperature, Auroras, Doppler Effect, Fabry-Perot Spectrometers, Geomagnetism, Gravity Waves, High Resolution, Nightglow, Temporal Resolution

Scientific paper

High time resolution measurements of Doppler shift and broadening of the QI 630 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 are frequently associated with the expansion phase of auroral substorms. Following the disturbance, prolonged periods of downward winds produce temperature enhancements of 200 K outside the source region, thus providing a mechanism for the redistribution of geomagnetic energy. Oscillatory behavior consistent with thermospheric gravity waves is observed during both quiet and disturbed conditions.

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