Constituting the basis of atmospheric dynamics, the fundamental properties of waves are described in this chapter. Waves are themselves important atmospheric motions and play roles in transporting energy, momentum, and tracers. Waves also have remote effects through their propagations. In this chapter, to begin with, we briefly review wave theory. Then, the governing equations of the atmosphere are linearized under various conditions including sound waves, gravity waves, inertial waves, Rossby waves, spherical waves, and equatorial waves. The structures and propagations of these waves are explained using the linear system. We mainly consider cases when the basic properties are spatially uniform. Wave propagations in an inhomogeneous flow will not be described in this chapter, although they are important and have interesting behaviors.
KeywordsDispersion Relation Group Velocity Gravity Wave Sound Wave Rossby Wave
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