Physics
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jats...39.1206l&link_type=abstract
Journal of the Atmospheric Sciences, vol. 39, June 1982, p. 1206-1226.
Physics
46
Atmospheric Heating, Atmospheric Models, Middle Atmosphere, Planetary Waves, Topography, Wind Profiles, Winter, Linear Equations, Northern Hemisphere, Primitive Equations, Spherical Coordinates, Vertical Distribution, Wave Propagation
Scientific paper
A primitive equation model is employed with different wind profiles to identify the influences of the mean zonal wind structure on vertical propagation and determine the effect of topography and diabatic heating on winter stationary waves. Steady, linearized primitive perturbation equations in the spherical coordinate system are employed, with forcings including topography and diabatic heating, while Rayleigh friction and Newtonian cooling serve for the damping processes. Vertical wave propagation was found to be significantly affected by the spatial structure of the mean zonal wind and the effect can be quantified by the refractive index squared. The strength of the zonal wind and the latitudinal and vertical derivatives contribute to the latitudinal gradient of the basic state potential vorticity, which is used to determine the gradient of the refractive index squared.
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