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The Batchelor spectrum and dissipation in the upper ocean Public Deposited

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  • Observations of vertical temperature microstructure at ocean station P during the mixed layer experiment (Mile) indicate that the shape of the high-frequency temperature gradient spectrum depends on the relative strengths of turbulence and stratification. For low Cox number ((dT/dz)²)/ (dT/dz)²• the linear range of the Batchelor spectrum is not well approximated by observed spectra, while for high Cox number a remarkably close corresponce to the Batchelor spectrum is found. Dissipation rates calculated by the temperature gradient spectrum cutoff wave number method show a dramatic contrast in turbulence between low and high wind speed periods separated by only 3 hours, showing that the response of the mixed layer and transition zone to wind forcing is rapid. Some indication is found that the thermocline may also respond rapidly to surface forcing.
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  • Dillon, T. M., & Caldwell, D. R. (1980). The Batchelor spectrum and dissipation in the upper ocean. Journal of Geophysical Research, 85(C4), 1910-1916.
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  • 85
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  • C4
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  • Office of Naval Research contract N00014-76-C-0067.
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