Accession Number : AD1009191


Title :   Turbulent Structure Under Short Fetch Wind Waves


Descriptive Note : Technical Report


Corporate Author : Naval Postgraduate School Monterey United States


Personal Author(s) : Papa,Michael J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1009191.pdf


Report Date : 01 Dec 2015


Pagination or Media Count : 77


Abstract : Momentum transfer from wind forcing into the ocean is complicated by the presence of surface waves. Wind momentum and energy are partitioned into wave growth, wave breaking, and wave forcing of the ocean surface layer. The purpose of this study was to support the ONR Coupled Boundary Layers and Air-Sea Transfer program by making very high spatial resolution profile measurements of the 3-D velocity field into the crest-trough region of wind-forced surface gravity waves, and study the low-frequency turbulent motions below the waves. The over arching goal is to improve model parameterization of how momentum is imparted on the ocean via wind-driven processes. At the Salinas River, in California, the Bistatic Coherent Acoustic Doppler Velocity Profiler and Thies Clima Ultrasonic 3-D Anemometer were deployed to capture the above-surface and subsurface velocity fields simultaneously to explore three main objectives: 1) determine the wave energy decay with depth and confirm the wave number, 2) determine the observed wind stress and calculate the wind stress using a bulk formula to identify any variations as a result of this estuarine environment, and 3) determine the turbulent stresses in the water column below the waves, and confirm the presence of Langmuir circulations and determine their advection and scaling.


Descriptors :   momentum transfer , surface WAVES , TURBULENCE , wind stress , ocean waves , gravity waves , low frequency


Distribution Statement : APPROVED FOR PUBLIC RELEASE