Other
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990angeo...8..705m&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 8, Oct. 1990, p. 705-711.
Other
11
Gravity Waves, Optical Radar, Rayleigh Scattering, Stratosphere Radiation, Vertical Distribution, Backscattering, Mesosphere, Power Spectra, Stratosphere, Temperature Profiles
Scientific paper
Rayleigh-scatter observations of molecular densities at stratospheric heights over Aberystwyth (U.K.) are examined to reveal the presence of gravity-wave motions in the height range 30-60 km. Three separate analytic approaches are applied, and it is found that significant differences in measured gravity wave parameters arise from these different methods. Examples of density and temperature profiles are presented which illustrate both these differences and some of the limitations of each technique. In particular, it is shown that one technique is insensitive to the presence of gravity-wave motions of period greater than about twice the data set length, and that the other two can produce spurious wave-like features of very low or zero vertical phase velocity. The implications of these limitations in terms of measurements of wave parameters are briefly discussed, and some suggestions are made as to how to avoid such analytic artifacts.
Marsh K. P. A.
Mitchell Nick J.
Thomas Luc
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