Physics
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.8955v&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Aug. 1, 1986, p. 8955-8969.
Physics
75
Atmospheric Tides, Computerized Simulation, Solstices, Annual Variations, Diurnal Variations, Geostrophic Wind, Temperature Distribution
Scientific paper
Numerical simulations are made to study the behavior of atmospheric tides in an atmosphere with arbitrary distribution of mean temperature and zonal wind. Owing to their importance at meteor heights, the parameterization of diffusive processes is discussed, and two kinds of models are used, depending on the particular mode studied. Specific attention is given to the (1, 1) mode of the diurnal tide with a view to taking into account the modification of its latitudinal-vertical structure due to the background atmosphere. Simulations of semidiurnal and diurnal tides are presented and compared with previous theoretical results and experimental data. However, the main goal is an improved theoretical description of the diurnal tide. In particular, (1, 1) mode 'distortion' due to mean wind are shown to be important in accounting for the seasonal variation of the amplitude of the diurnal tide existing in experimental data. The action of turbulent diffusion on the diurnal tide in the numerical results is also analyzed.
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