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Conclusions about turbulent exchange coefficients from model studies

Bengtsson, Lars LU (1973) In IAHS-AISH Publication 109. p.306-312
Abstract
Turbulent exchange coefficients are studied by field experiments and by mathematical models. The field experiments give a horizontal diffusivity of about 200 em'/s- The vertical exchange coefficient departs on the wind and is about 10 em'/s. Il has a maximum value a few metres below the surface and lends to fall to molecular values in the thermocline. Only where the thermocline is in contact with the bottom is there a significant transport of momentum from the epilimnion to the hypolimnion. In addition to the influence of the wind stress, the stream velocities and the circulation pattern are determined by the vertical eddy viscosity. The horizontal eddy viscosily does not play an important role on the circulation, but it makes the... (More)
Turbulent exchange coefficients are studied by field experiments and by mathematical models. The field experiments give a horizontal diffusivity of about 200 em'/s- The vertical exchange coefficient departs on the wind and is about 10 em'/s. Il has a maximum value a few metres below the surface and lends to fall to molecular values in the thermocline. Only where the thermocline is in contact with the bottom is there a significant transport of momentum from the epilimnion to the hypolimnion. In addition to the influence of the wind stress, the stream velocities and the circulation pattern are determined by the vertical eddy viscosity. The horizontal eddy viscosily does not play an important role on the circulation, but it makes the distribution of the flow more even. (Less)
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author
alternative title
Slutsatser om turbulenta utbytes koeficienter från modellstudier
publishing date
type
Contribution to journal
publication status
published
subject
in
IAHS-AISH Publication
volume
109
pages
7 pages
ISSN
0144-7815
language
English
LU publication?
no
id
f0d3c95b-fbba-42e5-adc5-41d2ae4f193a
date added to LUP
2023-06-16 10:40:27
date last changed
2023-06-19 13:57:19
@article{f0d3c95b-fbba-42e5-adc5-41d2ae4f193a,
  abstract     = {{Turbulent exchange coefficients are studied by field experiments and by mathematical models. The field experiments give a horizontal diffusivity of about 200 em'/s- The vertical exchange coefficient departs on the wind and is about 10 em'/s. Il has a maximum value a few metres below the surface and lends to fall to molecular values in the thermocline. Only where the thermocline is in contact with the bottom is there a significant transport of momentum from the epilimnion to the hypolimnion. In addition to the influence of the wind stress, the stream velocities and the circulation pattern are determined by the vertical eddy viscosity. The horizontal eddy viscosily does not play an important role on the circulation, but it makes the distribution of the flow more even.}},
  author       = {{Bengtsson, Lars}},
  issn         = {{0144-7815}},
  language     = {{eng}},
  pages        = {{306--312}},
  series       = {{IAHS-AISH Publication}},
  title        = {{Conclusions about turbulent exchange coefficients from model studies}},
  volume       = {{109}},
  year         = {{1973}},
}