Turbulence in the shallow nearshore environment during SANDYDUCK '97
Fredericks, Janet J.
Trowbridge, John H.
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An array of five acoustic Doppler velocimeters (ADV), which produce high quality measurements of the three-dimensional velocity vector in a sample volume with a scale of one centimeter, was deployed from late August through late November of 1997 at a water depth of approximately 4.5 m off Duck, North Carolina. The sensors were deployed near the sea floor but above the centimeters-thick wave boundary layer, and the sampling scheme was designed to resolve turbulence statistics averaged over tens of minutes, much longer than typical wave periods but shorter than time scales associated with variablity of energetic wind-driven and wave-driven alongshore flows.
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Feddersen, Falk; Trowbridge, John H.; Williams, Albert J. (American Meteorological Society, 2007-07)The vertical structure of the dissipation of turbulence kinetic energy was observed in the nearshore region (3.2-m mean water depth) with a tripod of three acoustic Doppler current meters off a sandy ocean beach. Surface ...
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Fredericks, Janet J.; Trowbridge, John H.; Agrawal, Yogesh C. (Woods Hole Oceanographic Institution, 1994-02)To provide observational data for analysis of near-bottom, wave-induced flows, a downward-looking laser Doppler velocimeter (LDV) was deployed to profile the near-bed velocity structure of a six meter water column at a ...