# 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> | + | <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 in which

*N*is the buoyancy frequency and*k*_{h}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.