Difference between revisions of "Internal gravity wave"

From Glossary of Meteorology
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<div class="definition"><div class="short_definition">(''Also called'' internal waves, [[gravity waves]].) A [[wave]] that propagates in  [[density]]-stratified fluid under the influence of [[buoyancy]] forces.</div><br/> <div class="paragraph">The [[dispersion relation]] is given by [[frequency]] <div class="display-formula"><blockquote>[[File:ams2001glos-Ie15.gif|link=|center|ams2001glos-Ie15]]</blockquote></div> in which ''N'' is the [[buoyancy frequency]] and ''k''<sub>''h''</sub> is the horizontal component of the [[wavenumber]]  vector '''k'''. For all wavenumbers, internal gravity waves have frequency smaller than ''N''. Their [[group  velocity]] is perpendicular to the [[phase velocity]] such that the vertical component of the group  velocity is opposite in sign to the vertical component of the phase velocity.</div><br/> </div>
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<div class="definition"><div class="short_definition">(''Also called'' internal waves, [[gravity waves]].) A [[wave]] that propagates in  [[density]]-stratified fluid under the influence of [[buoyancy]] forces.</div><br/> <div class="paragraph">The [[dispersion relation]] is given by [[frequency]] <div class="display-formula"><blockquote>[[File:ams2001glos-Ie15.gif|link=|center|ams2001glos-Ie15]]</blockquote></div> in which ''N'' is the [[buoyancy frequency]] and ''k''<sub>''h''</sub> is the horizontal component of the [[wavenumber]]  vector '''k'''. For all wavenumbers, internal gravity waves have frequency smaller than ''N''. Their [[group velocity|group  velocity]] is perpendicular to the [[phase velocity]] such that the vertical component of the group  velocity is opposite in sign to the vertical component of the phase velocity.</div><br/> </div>
 
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Latest revision as of 17:14, 25 April 2012



internal gravity wave

(Also called internal waves, gravity waves.) A wave that propagates in density-stratified fluid under the influence of buoyancy forces.

The dispersion relation is given by frequency
ams2001glos-Ie15
in which N is the buoyancy frequency and kh is the horizontal component of the wavenumber vector k. For all wavenumbers, internal gravity waves have frequency smaller than N. Their group velocity is perpendicular to the phase velocity such that the vertical component of the group velocity is opposite in sign to the vertical component of the phase velocity.