- Atmospheric waveguide
An atmospheric waveguide is an atmospheric
flow feature that improves the propagation of certainatmospheric wave s.The effect arises because wave parameters such as
group velocity or verticalwavenumber depend onmean flow direction and strength. Thus, for instance, westerlies might be a goodwaveguide for eastward-traveling waves, but might strongly dissipate westward-traveling waves, by increasing or decreasing their vertical wavenumber, respectively. Modification of the waves'group velocity will change theirmeridional propagation speed, directing them more polewards or more equatorwards.
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