Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-19T09:18:17.028Z Has data issue: false hasContentIssue false

Boundary mixing in a rotating, stratified fluid

Published online by Cambridge University Press:  21 April 2006

G. N. Ivey
Affiliation:
Research School of Earth Sciences, Australian National University, GPO Box 4, Canberra, ACT 2601, Australia

Abstract

An earlier laboratory experiment of Ivey & Corcos (1982) on boundary mixing in a stratified fluid was extended by including the effects of rotation. An axisymmetric version of the original laboratory experiments was constructed and a series of experiments conducted on a rotating table with the tank filled with salt-stratified solution. The combination of vertical mixing at the boundary and horizontal mixing by mesoscale eddies lead to the weakening of the interior density gradient. While the mechanisms were thus complex, the experiments demonstrated that the boundary-mixing process may be parameterized by a relatively simple formulation dependent upon the turbulence properties at the boundary and the tank dimensions.

Type
Research Article
Copyright
© 1987 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Armi, L. 1978 Some evidence for boundary mixing in the deep ocean. J. Geophys. Res. 83, 19711977.Google Scholar
Armi, L. 1979 Effects of variation in eddy diffusivity on property distributions in the deep ocean. J. Mar. Res. 37, 515530.Google Scholar
Caldwell, D. R., Brubaker, J. M. & Neal, V. T. 1978 Thermal microstructure on a lake slope. Limnol. Oceanogr. 23, 372374.Google Scholar
Dickson, R. R. & McCave, I. N. 1986 Nepheloid layers on the continental slope west of Porcupine Bank. Deep-Sea Res. 33, 791818.Google Scholar
Eriksen, C. C. 1985 Implications of ocean bottom reflections for internal wave spectra and mixing. J. Phys. Oceanogr. 15, 11451156.Google Scholar
Gargett, A. E. 1984 Vertical eddy diffusivity in the ocean interior. J. Mar. Res. 42, 359393.Google Scholar
Garrett, C. 1979 Comment on: Some evidence for boundary mixing in the deep ocean by L. Armi. J. Geophys. Res. 84, 50955096.Google Scholar
Gregg, M. C. & Sanford, T. M. 1980 Signatures of mixing from the Bermuda slope, the Sargasso Sea and the Gulf Stream. J. Phys. Oceanogr. 10, 105127.Google Scholar
Griffiths, R. W. & Linden, P. F. 1982 Laboratory experiments on fronts. Part 1: Density-driven boundary currents. Geophys. Astrophys. Fluid Dyn. 19, 159187.Google Scholar
Griffiths, R. W. & Hopfinger, E. J. 1984 The structure of mesoscale turbulence and horizontal spreading at ocean fronts. Deep Sea Res. 31, 245269.Google Scholar
Hopfinger, E. J. & Toly, J. A. 1976 Spatially decaying turbulence and its relation to mixing across density interfaces. J. Fluid Mech. 78, 155175.Google Scholar
Imberger, J. 1985 Thermal characteristics of standing waters: an illustration of dynamic processes. Hydrobiologia 125, 729.Google Scholar
Itsweire, E. C., Helland, K. N. & Van Atta, C. W. 1986 The evolution of grid-generated turbulence in a stably stratified fluid. J. Fluid Mech. 162, 297338.Google Scholar
Ivey, G. N. 1980 Boundary mixing in density-stratified fluids. PhD thesis, University of California, Berkeley.
Ivey, G. N. 1986 The role of boundary mixing in the deep ocean. J. Geophys. Res. (submitted).Google Scholar
Ivey, G. N. & Corcos, G. M. 1982 Boundary mixing in a stratified fluid. J. Fluid Mech. 121, 126.Google Scholar
McDougall, T. J. 1986 Thermobaricity, cabbeling and the interpretation of microstructure dissipation data. J. Geophys. Res. (in press).Google Scholar
Marmorino, G. O., Danos, S. C. & Maki, J. S. 1980 Temperature fine structure of Lake Michigan hypolimnion. Limnol. Oceanogr. 25, 680699.Google Scholar
Moum, J. N. & Osborn, T. R. 1986 Mixing in the main thermocline. J. Phys. Oceanogr. 16, 12501259.Google Scholar
Munk, W. 1966 Abyssal recipes. Deep Sea Res. 13, 707730.Google Scholar
Phillips, O. M. 1970 On flows induced by diffusion in a stably, stratified fluid. Deep Sea Res. 17, 435443.Google Scholar
Phillips, O. M., Shyu, J-H. & Salmun, H. 1986 An experiment on boundary mixing: mean circulation and transport rates. J. Fluid Mech. 173, 473499.Google Scholar
Schumacher, J. D., Kinder, T. H., Pashinski, D. J. & Charnell, R. L. 1979 A structural front over the continental shelf of the Eastern Bering Sea. J. Phys. Oceanogr. 9, 7987.Google Scholar
Simpson, J. H. 1976 A boundary front in the summer regime of the Celtic Sea. Est. Coast, Mar. Sci. 4, 7181.Google Scholar
Simpson, J. H., Tett, P. B., Argote-Espinoza, M. L., Edwards, A., Jones, K. L. & Savidge, G. 1982 Mixing and phytoplankton growth around an island in a stratified sea. Cont. Shelf Res. 1, 1532.Google Scholar
Stillinger, D. C., Helland, K. N. & Van Atta, C. W. 1983 Experiments on the transition of homogeneous turbulence to internal waves in a stratified fluid. J. Fluid Mech. 131, 91122.Google Scholar
Thorpe, S. A. 1982 On the layers produced by rapidly oscillating a vertical grid in a uniformly stratified fluid. J. Fluid Mech. 124, 391409.Google Scholar
Weatherly, G. L. & Martin, P. J. 1978 On the structure and dynamics of the oceanic bottom boundary layer. J. Phys. Oceanogr. 8, 557570.Google Scholar
Wunsch, C. 1972 Temperature microstructure on the Bermuda Slope with application to the mean flow. Tellus 24, 350367.Google Scholar