Direct measurements of nighttime thermospheric winds and temperatures. II - Geomagnetic storms

Physics

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Atmospheric Temperature, Magnetic Storms, Nightglow, Thermosphere, Wind Measurement, Atmospheric Physics, Convection Currents, Doppler Effect, Fabry-Perot Spectrometers, Gas Temperature, Geomagnetism, Line Spectra, Meridional Flow, Neutral Particles, Temperature Measurement

Scientific paper

A Fabry-Perot spectrometer was used at Fritz Peak Observatory, Colorado to determine the nighttime neutral thermospheric temperatures and winds during geomagnetic storm periods from the line profiles and Doppler shifts of the O I 15867-K (6300 A) line emission for the four periods in 1974: March 20-22, October 15-20, June 29-July 8, and April 16-27. Data are compared to model predictions (the Ogo 6 global empirical model and the semiempirical dynamic model of the neutral thermosphere). The results show significant variations in the dynamic character of the thermosphere which are related to geomagnetic storm intensity.

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