Note on the redistribution and dissipation of tidal energy over mid-ocean ridges
Author(s)Liang, Xinfeng; Wunsch, Carl
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The redistribution and dissipation of internal wave energy arising from the conversion at mid-ocean ridges of the barotropic tide is studied in a set of numerical experiments. A two-dimensional non-hydrostatic model with 100 m horizontal and 10–25 m vertical resolution is used to represent the detailed processes near an idealised ridge. Conventional internal wave beams at the tidal frequency, [superscript ѡ]M[subscript 2], appear. At the ridge crest, strong tidal energy dissipation occurs that both mixes the fluid and generates strong near-inertial oscillations radiating in near-horizontal beams. Resonant triad interaction between the tidal and inertial motions in turn produces beams at ([superscript ѡ]M[subscript 2] - f) and with high shear, thus effectively mixing fluid at considerable heights above the ridge crest.
DepartmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Liang, Xinfeng, and Carl Wunsch. “Note on the Redistribution and Dissipation of Tidal Energy over Mid-Ocean Ridges.” Tellus A 67, no. 0 (August 13, 2015).
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