Physics
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jatp...52..715s&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 52, Sept. 1990, p. 715-721. Research supported by the Univ
Physics
5
Diurnal Variations, Lunar Tides, Upper Atmosphere, Wind (Meteorology), Alaska, Annual Variations, Equinoxes, Vertical Distribution, Wavelengths
Scientific paper
The lunar semidiurnal tide is extracted from hourly values of winds in the 75-105 km region measured by the Poker Flat Alaska MST radar used in the meteor mode. Since year-to-year variations are apparent, detailed results for 1983 and 1984 are preented. Inferred vertical wavelengths range from 17 km in March 1983 to 46-55 km in September of 1983 and 1984. The height progression of the phase is frequently too irregular to derive a vertical wavelength. Amplitudes of 3 m/s are common and range up to 8 m/s. Amplitudes generally are largest at the equinoxes, especially in September, with another maximum in winter sometimes occurring. Reasonable agreement is found with lunar tidal measurements at Saskatoon, and some points of similarity are found with the solar semidiurnal tide at Poker Flat.
Avery Susan K.
Stening Robert J.
Tetenbaum D.
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