Thermospheric dynamics at the South Pole

Details Thermospheric dynamics at the South Pole Thermospheric dynamics at the South Pole

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1255h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Aug. 1990, p. 1255-1258.

Physics

22

Antarctic Regions, Doppler Effect, Earth Ionosphere, Fabry-Perot Interferometers, Thermosphere, Geomagnetism, Line Spectra, Temperature Measurement, Wind (Meteorology), Wind Variations

Scientific paper

A self-aligning Fabry-Perot spectrometer has been installed at Amundsen-Scott Station, Antarctica and has been used to determine neutral upper thermosphere winds and temperatures, obtained from the measurement of the Doppler shift and Doppler width of the line profiles of the forbidden O I 15,867 K (630 nm) line emission, during the austral winter of 1989. These first ground-based measurements of F-region neutral dynamics at the South Pole show a rich variety of dynamic phenomena and strong couplings with the ionospheric plasma. Data for two contrasting days in April 1989 are presented. The data of April 23 UT illustrate the diurnal variations of winds and temperatures during geomagnetic quiet-to-moderate conditions, while the data of April 27 UT illustrate diurnal variations during geomagnetically disturbed periods.

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