Occurrence characteristics of mesospheric gravity waves at 51°N

Details Occurrence characteristics of mesospheric gravity waves at 51°N Occurrence characteristics of mesospheric gravity waves at 51°N

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jastp..59.1197g&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, v. 59, p. 1197-1203.

Physics

3

Scientific paper

Observations of the OH(8-3) band rotational temperature have been carried out from Calgary (51°N, 114°W), Canada, from 1988 to 1990. The measurements have been taken in orthogonal scanning mode and the data set has been analyzed to study salient features of gravity waves in the mesospheric region from this mid-latitude station. Rotational temperature data from 36 nights showed distinct gravity wave activity during this period. The gravity wave characteristics studied include the dominant period, horizontal structure speed, implied horizontal wavelength and horizontal component of direction of propagation. The preferred direction in the horizontal wave propagation at Calgary is towards the north-west. A comparison of the observed horizontal propagation directions with the permitted directions, using model wind profiles for Calgary, shows good agreement. This indicates that the upward flow of wave energy could be modified by the background wind.

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