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A line in the sea

Abstract

THE ocean has considerable spatial and temporal heterogeneity in biomass and productivity owing in part to the effects of ocean circulation and mixing1,2. Water mass boundaries (fronts) in coastal waters are well-known sites of enhanced biological activity3,4. Comparatively little is known of open-ocean fronts, and one of the few biological studies of an oceanic front showed phytoplankton biomass at only slightly higher densities than in surrounding waters5. Here we present photographs and measurements from satellites, aircraft, ships and the Space Shuttle Atlantis which show dramatic biological responses to circulation and mixing processes associated with an open-ocean front. Breaking waves (whitecaps) caused by water turbulence and mixing, and very dark green water caused by extremely high concentrations (>20 mg of chlorophyll a per m3) of buoyant diatoms (Rhizosolenia sp.) made a distinct line in the sea visible for hundreds of kilometres. The line traced the northern edge of a westward-progagating (50 km per day) tropical instability wave (1,000-km wavelength) delineating the boundary between cold, upwelled waters and warmer waters to the north. High phytoplankton biomass and primary production associated with the extensive diatom patches may explain anecdotal observations of high animal abundance along this frontal boundary.

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References

  1. Haury, L. R., McGowan, J. A. & Wiebe, P. H. in Spatial Pattern in Plankton Communities (ed. Steele, J. H.) 277–328 (Plenum, New York, 1977).

    Google Scholar 

  2. Steele, J. H. in The Ecology of the Seas (eds Cushing, D. H. & Walsh, J. J.) 98–115 (Saunders, Philadelphia, 1976).

    Google Scholar 

  3. Yoder, J. A., Atkinson, L. P., Lee, T. N., Kim, H. H. & McClain, C. R. Limnol. Oceanogr. 26, 1103–1110 (1981).

    ADS  Article  Google Scholar 

  4. Marra, J., Houghton, R. W. & Garside, C. J. mar. Res. 48, 851–868 (1990).

    Article  Google Scholar 

  5. Fasham, M. J. R., Platt, T., Irwin, B. & Jones, K., Prog. Oceanogr. 14, 129–165 (1985).

    ADS  Article  Google Scholar 

  6. Murray, J. W., Barber, R. T., Bacon, M., Roman, M. R. & Feely, R. A. Science (in the press).

  7. Barber, R. T., Murray, J. W. & McCarthy, J. J. Ambio 23, 62–66 (1994).

    Google Scholar 

  8. Legeckis, R. Science 197, 1179–1181 (1977).

    ADS  CAS  Article  Google Scholar 

  9. Legeckis, R., Pichel, W. & Nesterczuk, G. Bull. Am. met. Soc. 64, 133–139 (1983).

    Article  Google Scholar 

  10. Miller, L., Watts, D. R. & Wimbush, M. J. phys. Oceanogr. 15, 1759–1770 (1985).

    ADS  Article  Google Scholar 

  11. Perigaud, C. J. geophys Res. 95, 7239–7248 (1990).

    ADS  Article  Google Scholar 

  12. Hoge, F. E., Berry, R. E. & Swift, R. N. Appl. Opt. 25, 39–47 (1986).

    ADS  CAS  Article  Google Scholar 

  13. Smith R. C. et al. Appl. Opt. 26, 2068–2081 (1987).

    ADS  CAS  Article  Google Scholar 

  14. Johnson, E. S. & Murray, J. W. A. Meeting Oceanography Soc. Honolulu, Hawaii, 18–22 July (1994).

    Google Scholar 

  15. Villareal, T., Altabet, M. & Culver-Rymsza, K. Nature 363, 709–712 (1993).

    ADS  CAS  Article  Google Scholar 

  16. Beebe, W. The Arcturus Adventure 45 (Putnam, New York, 1926).

    Google Scholar 

  17. Knauss, J. A. Tellus 9, 234–237 (1957).

    ADS  Article  Google Scholar 

  18. Kemp, A. E. S. & Baldauf, J. G. Nature 362, 141–143 (1993).

    ADS  Article  Google Scholar 

  19. Kemp, A. E. S., Baldauf, J. G. & Pearce, R. B. Proc. ODP Sci. Res. (in the press).

Download references

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Yoder, J., Ackleson, S., Barber, R. et al. A line in the sea. Nature 371, 689–692 (1994). https://doi.org/10.1038/371689a0

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  • DOI: https://doi.org/10.1038/371689a0

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