The non-linear interaction of a gravity wave with the vortical modes

Details The non-linear interaction of a gravity wave with the vortical modes The non-linear interaction of a gravity wave with the vortical modes

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jatp...51...45y&link_type=abstract

(IAGA, Symposium on Coupling, Energetics, Dynamics and Electrodynamics of Atmospheric Regions, Vancouver, Canada, Aug. 1987) Jou

Physics

14

Atmospheric Circulation, Gravity Waves, Propagation Modes, Vortices, Wave Interaction, Earth Rotation, Nonlinearity, Wave Attenuation, Wave Excitation

Scientific paper

A nonresonant wave-wave interaction theory is used to describe the interaction between a gravity wave and two vortical modes. It is found that the threshold condition (Dong and Yeh, 1988) in the absence of earth's rotation becomes blurred or nonexistent when the Coriolis force is included. Thus, the vortical modes are able to compete with the convective instability as a mechanism for extracting energy and momentum from gravity waves. In addition, the excitation and damping of vortical modes and their effects on the spectrum are discussed.

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