Physics
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985angeo...3..319m&link_type=abstract
Annales Geophysicae (ISSN 0755-0685), vol. 3, May-June 1985, p. 319-333.
Physics
Atmospheric Circulation, Gravity Waves, Internal Waves, Mesosphere, Stratosphere, Wave Propagation, Atmospheric Models, Conservation Laws, Dissipation, Equations Of Motion, Nonlinear Equations, Steady State
Scientific paper
A model of nonlinear internal gravity waves in a deep slowly varying atmosphere is examined. A solution for waves whose vertical scale is small compared with the scale height is obtained. A wave action equation for a single internal gravity wave mode, which is valid for arbitrary wave amplitude, is derived. It is shown that there is a critical amplitude such that no steady solution can exist for larger amplitudes and that where a steady state is possible, low-frequency waves have maxima in wave energy density at levels where the mean flow has minima and vice versa. The effects are identified as being the result of wave-mean flow interactions.
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