THE WINDWAVE AND TURBULENCE OBSERVATION PROGRAM (WAVTOP). THE MEASUREMENT OF PARAMETERS CONTROLLING DOWNWARD MIXING OF OIL FROM THE SEA SURFACE

The wave and turbulence observation program (WAVTOP) has developed instrumentation and techniques to gather field data of the wind-generated motions in the upper ocean. The sensor package (BLT) includes small fast-response impellers and a capacitance wave staff system to measure particle velocity components and free surface elevation to determine shear, kinetic and potential energy content, and Reynolds stresses in the upper 5-10m. The battery-powered recording system utilizes a microprocessor digitizer programmable for data sampling. Preliminary measurements were made with the BLT mounted on the AESOP Stable Spar Buoy and from a fixed boom on Gould Island. Results portray kinetic energy attenuating exponential with depth and correlating with the local wind speed. The vertically integrating energy appears to correlate with the cube of the wind speed with a 15-20 min time lag. Auto-spectra of the velocity data display narrow peaks demonstrating the monochromaticity of small wind waves. The spectra verify the attenuation of the wave energy with depth. Higher frequency (wave number) energy persists at deeper depths suggesting the presence of ambient turbulence. Reynolds stresses show fluctuations with time but display downward momentum flux and range from 1-2 dyne/cm2 for winds from 4-5 m/sec.

  • Corporate Authors:

    Naval Underwater Systems Center

    New London, CT  USA 

    United States Coast Guard

    2100 Second Street, SW
    Washington, DC  USA  20593
  • Publication Date: 1979-5

Media Info

  • Pagination: 103 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00313952
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: USCG-D-68-79
  • Contract Numbers: MIPR-Z-70099-7-71825
  • Files: NTIS
  • Created Date: Jul 22 2002 12:00AM