Systematic measurements of northern hemisphere winds in the meteor region at 45 deg latitude

Details Systematic measurements of northern hemisphere winds in the meteor region at 45 deg latitude Systematic measurements of northern hemisphere winds in the meteor region at 45 deg latitude

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jatp...42...83v&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 42, Jan. 1980, p. 83-95.

Mathematics

Logic

5

Midlatitude Atmosphere, Northern Hemisphere, Radar Echoes, Radio Meteors, Wind Measurement, Amplitudes, Diurnal Variations, Doppler Effect, Meteorological Radar, Thermosphere

Scientific paper

This paper presents the results obtained from wind measurements for an altitude of 95 km made at the CNR Meteor Radar Station at Budrio (44 deg 33 min N, 11 deg 38 min E) in the 1-year period February 1976-January 1977. Diurnal averages of the prevailing and periodic components of the zonal wind are presented for each month. The average prevailing wind of about 15 m/s is in good agreement with the CIRA 1972 model for 45 deg N seasonal variations extending between zero in April and 28 m/s in January. The semidiurnal tide is very regular, with a yearly average of 21 m/s while the diurnal tide exhibits irregular changes in amplitude, about an average of 10 m/s and variations in period ranging from 19-32 h. The terdiurnal tide, present in all months except April, shows irregular seasonal fluctuations about a mean of 7 m/s. A number of long period oscillations with periods between 31 and 51 hours have also been identified. One particular mode at 51 h shows a seasonal peak in July and during September a 7-day oscillation of 9 m/s amplitude was tentatively identified.

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