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Note on the beam structure in step-trapped internal tides
Sanders, P.A.; Dorrestijn, M.D.; Gerkema, T. (2024). Note on the beam structure in step-trapped internal tides. J. Phys. Oceanogr. 54(3): 871-875. https://dx.doi.org/10.1175/jpo-d-23-0084.1
In: Journal of Physical Oceanography. American Meteorological Society: Boston, etc.,. ISSN 0022-3670; e-ISSN 1520-0485, more
Peer reviewed article  
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  • Sanders, P.A.
  • Dorrestijn, M.D.
  • Gerkema, T., more
Abstract
    The along-slope propagation of subinertial trapped internal tides is studied for the configuration of a simple step. It is revealed that they form a beam structure in the along-slope direction that is evanescent above the top of the step; these beams lack strict periodicity in the along-slope direction. As in classical internal Kelvin waves, they become less sharp away from the step, as higher modes decay more rapidly in the cross-slope direction. We discuss implications for abyssal mixing and outline the necessary ingredients for their generation.
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