PIV Measurements of Turbulence and Flow Structure in the Water Column of the Coastal Ocean

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This work combines instrument development and scientific observationsand seeks to apply a proven laboratory technique to the observation ofturbulence in the coastal ocean. A Particle Imagery Velocimetry (PIV) instrument will be deployed on an extensible platform restingon the sea-floor in coastal waters. After testing, the device willbe deployed in 15m of water at the LEO-15 site and used to repeatedlymeasure the flow field over an area of from 0.25 to 0.5 m^2. The resulting data will be used to examine various properties of turbulence in the coastal ocean and its dependence on environmentalparameters such as stratification, wave state and macroscopic shear.Additional data will be collected from the instrument suite alreadyin place at LEO-15 in order to characterize the environmental parameters. Separate deployments during late spring and fall will allow the PIs to study turbulence in different degrees of stratification.