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Detailed Reference Information |
Taylor, J. (1991). Laboratory experiments on the formation of salt fingers after the decay of turbulence. Journal of Geophysical Research 96: doi: 10.1029/90JC02313. issn: 0148-0227. |
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Previous laboratory experiments have shown that salt fingers are easily disrupted by turbulence. However, in the interior of the ocean, turbulence is both patchy and intermittent, so that there may be sufficient time for the fingers to form between turbulent events. The growth of salt fingers after disruption by turbulence was examined in an experiment in which an oceanic turbulent event was simulated by a grid falling through fingers set up in a laboratory tank. Both horizontal conductivity and temperature profiles showed that after the grid turbulence had decayed the fingers grew rapidly, and that the time scale for growth was of the same order as the d-folding time for the fastest-growing long salt finger modes that have been described previously by several authors. This time scale is consistent with the observation that the peak in the temperature gradient spectrum was close to the predicted wave number for fastest-growing fingers. On the other hand, visualization of the fingers suggests that the period of exponential growth of the finger amplitudes was short, of the order of one e-folding period. Finally, the results of these experiments suggest that with the typical intermittency of turbulence in the interior of the ocean, salt fingers should have sufficient time to grow between events. ¿ American Geophysical Union 1991 |
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Abstract |
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Keywords
Oceanography, Physical, Turbulence, diffusion, and mixing processes, Oceanography, Physical, Fine structure and microstructure |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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