Open AccessOn the Body-Force Term in Internal-Tide Generation
Author(s) -
Chris Garrett,
Theo Gerkema
Publication year - 2007
Publication title -
journal of physical oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.706
H-Index - 143
eISSN - 1520-0485
pISSN - 0022-3670
DOI - 10.1175/jpo3165.1
Subject(s) - baroclinity , barotropic fluid , buoyancy , hydrostatic equilibrium , internal tide , geology , current (fluid) , mechanics , flow (mathematics) , term (time) , physics , geophysics , classical mechanics , oceanography , internal wave , quantum mechanics
The generation of internal tides can be ascribed to the action of a buoyancy force caused by the flow of the barotropic tide over topographic features. It is commonly assumed that the barotropic flow can be taken as hydrostatic, but it is shown here that this leads to a linearized governing equation for the baroclinic tide that is only valid if the baroclinic tide is also hydrostatic. A governing equation for the baroclinic tide, valid for any situation, is derived here and is shown to be exactly equivalent to a simple transformation of the governing equation for the combined barotropic and baroclinic tides.