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Propagation of internal tides from the upper slopes of the Bay of Biscay

Abstract

The shelf-break region of the Celtic Sea (north of the Bay of Biscay) is characterized by a reduced sea-surface temperature (1 °C) throughout the summer months1. The cool region stretches for 300 km along the slopes and exhibits enhanced levels of surface phytoplankton abundance. It has been postulated2 that physical mixing creates this favourable environment for phytoplankton growth by mixing inorganic nutrients from below the seasonal thermocline, allowing the plant cells to grow more favourably in the well-illuminated surface waters. One possibility is that the mixing is due to the production and propagation of internal tides3–6. The present study was undertaken to detect and observe the nature of the internal tide at the Celtic Sea shelf break. We show here that internal tides, generated at spring tides close to the 200-m contour7–9, propagate simultaneously both on shelf and into the ocean as distorted progressive waves, and when this happens, nutrients are mixed towards the sea surface.

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References

  1. Pingree, R. D. J. mar. biol. Ass. U.K. 59, 689–698 (1979).

    Article  Google Scholar 

  2. Pingree, R. D. & Mardell, G. T. Phil. Trans. R. Soc. A302, 663–682 (1981).

    Article  ADS  Google Scholar 

  3. Pingree, R. D., Mardell, G. T., Holligan, P. M., Griffiths, D. K. & Smithers, J. Continent. Shelf Res. 1, 99–116 (1982).

    Article  ADS  Google Scholar 

  4. Sandstrom, H. & Elliott, J. A. J. geophys. Res. 89, 6415–6426 (1984).

    Article  ADS  Google Scholar 

  5. Briscoe, M. G. Nature 312, 15 (1984).

    Article  ADS  Google Scholar 

  6. Holligan, P. M., Pingree, R. D. & Mardell, G. T. Nature 314, 348–350 (1985).

    Article  ADS  CAS  Google Scholar 

  7. Rattray, M. Jr Tellus 12, 54–62 (1960).

    Article  ADS  Google Scholar 

  8. Baines, P. G. Deep Sea Res. 29, 307–338 (1982).

    Article  ADS  Google Scholar 

  9. Pingree, R. D., Griffiths, D. K. & Mardell, G. T. J. mar. biol. Ass. U.K. 64, 99–113 (1983).

    Article  Google Scholar 

  10. Pingree, R. D. & Mardell, G. T. Prog. Oceanogr. 14, 431–441 (1985).

    Article  ADS  Google Scholar 

  11. Collins, D. S., Pollard, R. T. & Suchen, Pu. Inst. Oceanogr. Sci. Rep. 148, 1–75 (1983).

    Google Scholar 

  12. Fasham, M. J. R., Pugh, P. R., Griffiths, D. & Wheaton, J. E. G. Radio electr. Engnr. 53, 21–24 (1983).

    Article  Google Scholar 

  13. Haury, L. R., Wiebe, P. H., Orr, M. H. & Briscoe, M. G. J. mar. Res. 41, 65–112 (1983).

    Article  Google Scholar 

  14. Kerry, N. J., Burt, R. J., Lane, N. M. & Bagg, M. T. J. phys. Oceanogr. 14, 1419–1423 (1984).

    Article  ADS  Google Scholar 

  15. Sabinin, K. D., Nazarov, A. A. & Serikov, A. N. Izv. atmos. Oceanic Phys. 18, 317–323 (1982).

    Google Scholar 

  16. Madelain, F. & Kerut, E. G. Oceanol. acta 1, 159–168 (1978).

    Google Scholar 

  17. Dickson, R. R. & Hughes, D. G. Oceanol. acta 4, 43–46 (1981).

    Google Scholar 

  18. Pingree, R. D. in Remote Sensing of Shelf Sea Hydrodynamics (ed. Nihoul, J. C. J.) 287–315 (Elsevier, Amsterdam, 1984).

    Google Scholar 

  19. Huthnance, J. M. Prog. Oceanogr. 10, 193–226 (1981).

    Article  ADS  Google Scholar 

  20. Mazé, R. thesis, Univ. Bretagne Occidentale (1983).

  21. Hunter, J. R. Estuar. coast. Shelf Sci. 3, 473–479 (1975).

    Article  ADS  Google Scholar 

  22. Proudman, J. Dynamical Oceanography (Methuen, Oxford, 1953).

    Google Scholar 

  23. Bell, T. H. Jr Naval Res. Labs, Washington, Rep. No 7294 (1971).

  24. James, I. D. Deep Sea Res. 29, 1099–1111 (1982).

    Article  ADS  Google Scholar 

  25. Pereskokov, A. I. & Schulepov, V. A. Oceanology 24, 565–569 (1984).

    Google Scholar 

  26. Pingree, R. D. & Morrison, G. K. J. phys. Oceanogr. 3, 280–285 (1973).

    Article  ADS  Google Scholar 

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Pingree, R., Mardell, G. & New, A. Propagation of internal tides from the upper slopes of the Bay of Biscay. Nature 321, 154–158 (1986). https://doi.org/10.1038/321154a0

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