Vertical winds in the midlatitude thermosphere from Fabry-Perot interferometer measurements

Details Vertical winds in the midlatitude thermosphere from Fabry-Perot interferometer measurements Vertical winds in the midlatitude thermosphere from Fabry-Perot interferometer measurements

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jatp...57..621s&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 57, no. 6, p. 621-629

Physics

23

Diurnal Variations, Geomagnetism, Magnetic Effects, Temperate Regions, Thermosphere, Vertical Air Currents, Wind Velocity, Atmospheric Tides, Bistatic Reflectivity, Doppler Effect, Emission Spectra, Error Analysis, Fabry-Perot Interferometers, Gravity Waves, Magnetic Disturbances, Nightglow, Oxygen Atoms

Scientific paper

Monostatic and bistatic measurements of thermospheric winds have been made with Fabry-Perot Interferometers at the Millstone Hill and Laurel Ridge Observatories. Synchronized observing sequences have been chosen to enable the determination of vertical winds from the measurements. The vertical winds are found to be significant on some nights with velocities of tens of m/s. For geomagnetically quiet nights, the averaged values for eight samples in the July-October 1992 period show little variation during the night, averaging approximately 10 m/s downward. The average for three geomagnetically disturbed nights oscillates from a downward maximum of approximately 50 m/s at approximately 02 Universal Time (UT) to an upward maximum of approximately 20 m/s at approximately 07 Universal Time (UT). Temporal variation in the vertical motions suggest oscillatory behavior with periods of approximately 0.7, approximately 1.8 and approximately 3.4 h, respectively, on three quiet nights, possibly associated with gravity wave or tidal-harmonic effects.

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