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Mechanisms of turbulent mixing in the continental shelf bottom boundary layer

Author: William J Shaw; Joint Program in Oceanography/Applied Ocean Science and Engineering.; Massachusetts Institute of Technology.; Woods Hole Oceanographic Institution.
Publisher: Cambridge, Mass. : Massachusetts Institute of Technology ; Woods Hole, Mass. : Woods Hole Oceanographic Institution, [2000]
Series: MIT/WHOI, 2000-03.
Edition/Format:   Book : EnglishView all editions and formats
Database:WorldCat
Summary:
The bottom boundary layer is an important dynamical region of shallow water flows. In this thesis, the problem of turbulent mixing in the coastal bottom boundary layer is investigated with a unique set of field measurements of velocity and sound speed that span a significant fraction of the boundary layer obtained over a six-week long period in the late summer of 1996 on the New England shelf. The energetics of the  Read more...
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Additional Physical Format: Online version:
Shaw, William J.
Mechanisms of turbulent mixing in the continental shelf bottom boundary layer.
Cambridge, Mass. : Massachusetts Institute of Technology ; Woods Hole, Mass. : Woods Hole Oceanographic Institution, [2000]
(OCoLC)656124985
Material Type: Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: William J Shaw; Joint Program in Oceanography/Applied Ocean Science and Engineering.; Massachusetts Institute of Technology.; Woods Hole Oceanographic Institution.
OCLC Number: 44993947
Notes: "February 2000."
"Doctoral dissertation."
"Joint Program in Oceanography/Applied Ocean Science and Engineering"--Cover.
Originally issued as the author's thesis (Ph. D.)--Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2000.
Description: 171 p. : ill. ; 28 cm.
Series Title: MIT/WHOI, 2000-03.
Responsibility: by William J. Shaw.

Abstract:

The bottom boundary layer is an important dynamical region of shallow water flows. In this thesis, the problem of turbulent mixing in the coastal bottom boundary layer is investigated with a unique set of field measurements of velocity and sound speed that span a significant fraction of the boundary layer obtained over a six-week long period in the late summer of 1996 on the New England shelf. The energetics of the turbulent fluctuations are investigated by testing simplified budgets for turbulent kinetic energy and scalar variance. The turbulent kinetic energy budget is locally balanced while the scalar variance budget is not, probably due to turbulent diffusion. The direct effects of stratification are consistently significant only in the outer part of the boundary layer, where the flux Richardson number is approximately equal to a critical value of 0.2. Turbulence closure is investigated in terms of non-dimensional profiles of velocity and sound speed. Close to the bottom, the results are consistent with Monin-Obukhov similarity theory, while in the outer part of the boundary layer other scales including the height of the boundary layer are important for setting the turbulent length scale.

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