Accession Number:

ADA633930

Title:

Coastal and Near Surface Mixing

Descriptive Note:

Corporate Author:

VICTORIA UNIV (CANADA) SCHOOL OF EARTH AND OCEAN SCIENCES

Personal Author(s):

Report Date:

1997-09-30

Pagination or Media Count:

6.0

Abstract:

We are using a unique towed vehicle that carries both conventional turbulence sensors and acoustic transducers. Turbulent vertical velocity fluctuations and the rate of dissipation of kinetic energy are measured with shear probes, while temperature fluctuations as small as 0.00001 C are measured with an FP-07 thermistor. The vertical flux of heat is estimated from the covariance of the turbulent vertical velocity and temperature. The rate of dissipation is estimated from the variance of the horizontal gradient of vertical velocity. Sonars two athwartship direct side-scans, one forward directed side-scan and a vertical echo sounder mounted on the towed vehicle are used to map out the distribution of turbulence with respect to bubble clouds hence, Langmuir cells in the near surface zone. A paravane deflects the tow line by about 40 m away from the side of the ship and out of its wake.

Subject Categories:

  • Geography
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE