A laboratory study of low-mode internal tide scattering by finite-amplitude topography

We present the first laboratory experimental results concerning the scattering of a low-mode internal tide by finite-amplitude Gaussian topography. Experiments performed at the Coriolis Platform in Grenoble used a recently conceived internal wave generator as a means of producing a high-quality mode...

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Bibliographic Details
Published in:Physics of fluids (1994) 2009-12, Vol.21 (12)
Main Authors: PEACOCK, Thomas, MERCIER, Matthieu J, DIDELLE, Henri, VIBOUD, Samuel, DAUXOIS, Thierry
Format: Article
Language:English
Subjects:
Dynamics of the ocean (upper and deep oceans)
Earth, ocean, space
Exact sciences and technology
External geophysics
Fluid mechanics
Mechanics
Physics
Physics of the oceans
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Summary:We present the first laboratory experimental results concerning the scattering of a low-mode internal tide by finite-amplitude Gaussian topography. Experiments performed at the Coriolis Platform in Grenoble used a recently conceived internal wave generator as a means of producing a high-quality mode-1 wave field. The evolution of the wave field in the absence and presence of a Gaussian was studied by performing spatiotemporal modal decompositions of velocity field data obtained using particle image velocimetry. The results support the belief that finite-amplitude topography produces significant reflection of the internal tide and transfer of energy from low to high modes.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.3267096