Energy fluxes in coastal trapped waves
Energy fluxes in coastal trapped waves
Date
2019-12-03
Authors
Musgrave, Ruth C.
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DOI
10.1175/JPO-D-18-0172.1
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Keywords
Diapycnal mixing
Internal waves
Kelvin waves
Topographic effects
Waves, oceanic
Tides
Internal waves
Kelvin waves
Topographic effects
Waves, oceanic
Tides
Abstract
The calculation of energy flux in coastal trapped wave modes is reviewed in the context of tidal energy pathways near the coast. The significant barotropic pressures and currents associated with coastal trapped wave modes mean that large errors in estimating the wave flux are incurred if only the baroclinic component is considered. A specific example is given showing that baroclinic flux constitutes only 10% of the flux in a mode-1 wave for a reasonable choice of stratification and bathymetry. The interpretation of baroclinic energy flux and barotropic-to-baroclinic conversion at the coast is discussed: in contrast to the open ocean, estimates of baroclinic energy flux do not represent a wave energy flux; neither does conversion represent the scattering of energy from the tidal Kelvin wave to higher modes.
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Author Posting. © American Meteorological Society, 2019. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 49(12), (2019): 3061-3068, doi: 10.1175/JPO-D-18-0172.1.
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Musgrave, R. C. (2019). Energy fluxes in coastal trapped waves. Journal of Physical Oceanography, 49(12), 3061-3068.