Physics
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55..289r&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 3, p. 289-312.
Physics
23
Atmospheric Tides, Doppler Radar, Imaging Radar, Meridional Flow, Mesopause, Wind Measurement, Zonal Flow (Meteorology), Atmospheric Circulation, Incoherent Scatter Radar, Interferometry, Mesosphere
Scientific paper
A tidal analysis of the imaging Doppler interferometer scattering point parameter data at upper mesosphere-lower thermosphere altitudes (70-110 km) is presented, on the basis of the procedure developed by Groves (1959), over the interval April 5-11, 1989 at Aercibo as part of Project AIDA. This analysis reveals a typical equatorial easterly circulation, with mean meridional circulation becoming significant only above 96 km. A periodogram analysis shows the diurnal tide to be the most significant feature of the wind field at these altitudes, with zonal amplitudes up to some 50 m/s and meridional amplitudes approximately half this value. The semidiurnal tide is well developed in both zonal and meridional directions only above 96 km. Both 8- and 6-hr components become significant above 100 km, the 6-h component being as strong as both the 24- and 12-h tides at 100 km.
Adams Gene W.
Brosnahan John W.
Roper R. G.
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