Suppression of stationary planetary waves by internal gravity waves in the mesophere

Details Suppression of stationary planetary waves by internal gravity waves in the mesophere Suppression of stationary planetary waves by internal gravity waves in the mesophere

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icsu...18..154m&link_type=abstract

In International Council of Scientific Unions Handbook for MAP, Vol. 18 p 154-156 (SEE N86-27719 18-46)

Other

Drag, Geopotential Height, Gravity Waves, Internal Waves, Mathematical Models, Mesosphere, Parameterization, Planetary Waves, Retarding, Stratosphere, Coefficient Of Friction, Rayleigh Equations, Wave Amplification, Wind Profiles

Scientific paper

The supression of stationary planetary waves by internal gravity waves in the mesosphere is treated using a quasi-geostrophic model on a midlatitude beta-plane. The drag forces due to internal gravity waves are parameterized based on the wave-breaking assumption proposed by Lindzen (1981). In the present model the vertical propagation of internal gravity waves is affected not only by mean zonal wind distribution but also by eastward and northward velocity perturbations associated with stationary planetary waves, viz. the total local velocity. Only two stationary upward propagating internal gravity waves with the same horizontal wavelength 57 km, but whose wave number vectors are different are considered. One component has a wave number vector which is directed towards northeast, and the other is directed southeast. Planetary waves with zonal wave number 1 are considered, and the amplitudes of the geopotential height at the bottom (z=20km) are specified to be 50 m.

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