Temperature Gradient above the Deep-Sea Floor

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Abstract

AT sufficient ocean depths (several km) there is an increase of temperature with depth corresponding to the adiabatic lapse rate Γ ≈ 10−6 °C/cm. Toward the bottom, the gradient becomes increasingly superadiabatic, because the water is heated from below by a geothermal heat flux H. Because H is small (10−6 calories cm−2 s−1), only a slight superadiabatic effect is expected: |dT/dz| < 2Γ at elevation z > 1 m. Measurements of hyperadiabatic gradients (|dT/dz| = 10–1,000 Γ) several metres, or even tens of metres, above the bottom have been reported1–4, though it seems inconceivable that a strongly unstable layer several metres thick can persist. The experiment described here indicates that |dT/dz| = 1.3 Γ at z 1 m.

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References

  1. 1

    Gamutilov, A. E., Dobrovolsky, A. D., Sabinin, K. D., Udintsev, G. B., Trudy Inst. Okeanol. Akad. Nauk SSSR, 39, 89 (1960).

  2. 2

    Sysoev, N. N., Dokl. Akad. Nauk SSSR, 137, 698 (1961).

  3. 3

    Lubimova, E. A., Von Herzen, R. P., and Udintsev, G. B., in Terrestrial Heat Flow (edit. by Lee, W. H. K.), chap. 5 (American Geophysical Union, 1965).

  4. 4

    Bodvarsson, G., Berg, J. W., and Mesecar, R. S., J. Geophys. Res., 72, 2693 (1967).

  5. 5

    Wimbush, M., Munk, W., in The Sea, 4 (edit. by Maxwell, A. E.), chap. 19 (Wiley-Interscience, 1970).

  6. 6

    Townsend, A. A., Quart. J. Roy. Meteorol. Soc., 88, 51 (1962).

  7. 7

    Caldwell, D. R., Snodgrass, F. E., and Wimbush, M. H., Physics Today, 22, No. 7, 34 (1969).

  8. 8

    Snodgrass, F. E., Science, 162, 78 (1968).

  9. 9

    Wimbush, M., and Sclater, J., J. Geophys. Res. (in the press).

  10. 10

    Acrivos, A., Leal, L. G., Snowden, D. D., and Pan, F., J. Fluid Mech., 34, 25 (1968).

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WIMBUSH, M. Temperature Gradient above the Deep-Sea Floor. Nature 227, 1041–1043 (1970) doi:10.1038/2271041b0

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