First observations of mesospheric dynamics with a partial reflection radar in Hawaii (22 deg N, 160 deg W)

Details First observations of mesospheric dynamics with a partial reflection radar in Hawaii (22 deg N, 160 deg W) First observations of mesospheric dynamics with a partial reflection radar in Hawaii (22 deg N, 160 deg W)

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19..409f&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, Feb. 21, 1992, p. 409-412.

Mathematics

Logic

34

Atmospheric Circulation, Mesosphere, Meteorological Radar, Reflection, Wind Profiles, Annual Variations, Planetary Waves, Temperate Regions, Zonal Flow (Meteorology)

Scientific paper

A partial-reflection MF radar was installed at the Pacific Missile Range Facility on Kanai, Hawaii in September 1990. The wind measurements obtained with this radar system in Hawaii during the first year of operation are reviewed. The data reveal a broad spectrum of motions ranging from a mix of the equatorial mesopause semiannual oscillation (MSAO) and the annual mean cycle at middle and high latitudes in the zonal mean structure to low-frequency, tidal, and gravity wave motions at higher frequencies. The zonal mean wind structure is characterized by a downward progression of strong eastward and westward phases of the MSAO from approximately January to July. An eastward maximum of about 60/ms near 80 km during January and February is found, which descends rapidly, and a westward maximum of about 50 ms near 85 km during March and April is found, which descends much more slowly. The second MSAO cycle is greatly suppressed relative to the first due to the reversal of the correlation between this and the annual cycle at higher latitudes from July to December.

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