Measurements of Reynolds Stress in a wind driven lagoonal estuary Public Deposited

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Last Modified
  • March 21, 2019
Creator
  • Whipple, Anthony Clyde
    • Affiliation: College of Arts and Sciences, Department of Marine Sciences
Abstract
  • ADCPs have been used to measure Reynolds stresses in tidally dominated environments where wave action was minimal. In this thesis we examine observations from a microtidal estuary where the effects of wind stress and surface waves dominate the velocity variance. Reynolds stress measurements in this setting require a technique for addressing surface gravity wave contamination. We present here a method of reducing the effect of wave motion on Reynolds stresses by subtracting coincident observations along the axis of the ADCP beam. Linear wave theory is used to account for the attenuation of wave orbital velocities with depth. Using this method, Reynolds stress values are brought in line with those predicted by drag laws at the surface and bottom. Coincident density profile measurements are used with the ADCP data to compute gradient Richardson numbers throughout the water column. Enhanced Reynolds stresses appear to correspond to Richardson numbers less than one.
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  • In Copyright
Advisor
  • Luettich, Richard A.
Degree granting institution
  • University of North Carolina at Chapel Hill
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  • Open access
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