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Transfer of heat, fresh water and nutrients through the seasonal thermocline

Published online by Cambridge University Press:  11 May 2009

R. D. Pingree  and
Linda Pennycuick
R. D. Pingree*
Affiliation:
Institute of Oceanographic Sciences, Wormley, Surrey, and The Laboratory, Marine Biological Association, Citadel Hill, Plymouth
Linda Pennycuick
Affiliation:
Institute of Oceanographic Sciences, Wormley, Surrey, and The Laboratory, Marine Biological Association, Citadel Hill, Plymouth
*
*Present address: The Laboratory, Marine Biological Association, Citadel Hill, Plymouth.
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Extract

This paper estimates the turbulent transport of heat, fresh water and nutrients through the seasonal thermocline. In order to obtain a representative estimate of the annual variation it is necessary to average data obtained at a single position over a number of years. The number of years of sampling required depends on the particular parameter being studied. This can be seen by comparing the annual variation with the standard deviation, σ, for a specific month. This is analogous to the signal to noise ratio. For example, the annual range of temperature (or signal) is about 8°C for the water of the western English Channel. The variability of temperature in the same area (or noise) is about o.6°C. This figure is the standard deviation for the temperature obtained in a specific month at a fixed depth when data from a large number of different years are available. This variability can be attributed to a number of causes, to list a few; horizontal patchiness, local weather, advection, long term climatic changes. Hence for temperature the signal to noise ratio is about 13 and the annual pattern of events will clearly be established on the basis of monthly values obtained at a position during a single year.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 55 , Issue 2 , May 1975 , pp. 261 - 274
Copyright
Copyright © Marine Biological Association of the United Kingdom 1975

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References

Atkins, W. R. G., 1922. The phosphate content of fresh and salt waters in its relationship to the growth of the algal plankton. Journal of the Marine Biological Association of the United Kingdom, 13, 119–50.Google Scholar
Boalch, G. T., Armstrong, F. A. J. & Butler, E. I., 1969. N.A.T.O. Productivity Project. United Kingdom Report from the Marine Biological Association of the United Kingdom. Technical Report N.A.T.O. Subcommittee in Oceanographic Research, 47, 96–102.Google Scholar
Bowden, K. F., 1948. The processes of heating and cooling in a section of the Irish Sea. Monthly Notices of the Royal Astronomical Society. Geophysical Supplement, 5 (7), 270–81.Google Scholar
Bowden, K. F., 1950. Processes affecting the salinity of the Irish Sea. Monthly Notices of the Royal Astronomical Society. Geophysical Supplement, 6 (2), 63–90.Google Scholar
Bowden, K. F., 1955. Physical oceanography of the Irish Sea. Fishery Investigations, London, Series 2, 18 (8), 1–67.Google Scholar
Budyko, M. I., 1974. Climate and life. 508 pp. New York and London: Academic Press.Google Scholar
Carruthers, J. N., 1927. Investigations upon the water movements in the English Channel. Summer, 1924. Journal of the Marine Biological Association of the United Kingdom, 14, 685–721.Google Scholar
Cartwright, D. E., 1961. A study of currents in the Strait of Dover. Journal of the Institute of Navigation, 14 (2), 130–51.CrossRefGoogle Scholar
Cooper, L. H. N., 1958. Consumption of nutrient salts in the English Channel as a means of measuring production. Rapport et proces-verbaux des reunions. Conseil permanent international pour Vexploration de la mer, 144, 35–7.Google Scholar
Cooper, L. H. N., 1960. The water flow into the English Channel from the South-West. Journal of the Marine Biological Association of the United Kingdom, 39, 173–208.Google Scholar
Corner, E. D. S. & Davies, A. G., 1971. Plankton as a factor in the nitrogen and phosphorus cycles in the sea. Advances in Marine Biology, 9, 101–204.CrossRefGoogle Scholar
Day, G. J., 1961. Distribution of total solar radiation on a horizontal surface over the British Isles and adjacent areas. Meteorological Magazine, 90 (1071), 269–84.Google Scholar
Dietrich, G., 1951. Influences of tidal streams on oceanographic and climatic conditions in the sea as exemplified by the English Channel. Nature, London, 168, 8.Google Scholar
Fleming, R. H., 1939. The control of diatom populations by grazing. Journal du Conseil, 14, 210–27.CrossRefGoogle Scholar
Harvey, H. W., 1930. Hydrography of the mouth of the English Channel 1925–1928. Journal of the Marine Biological Association of the United Kingdom, 14, 791–820.CrossRefGoogle Scholar
Lumby, J. R., 1935. Salinity and temperature of the English Channel. Fishery Investigations, London, Series 2, 14 (3), 1–67.Google Scholar
Pingree, R. D. & Griffiths, D. K., 1974. The turbulent boundary layer on the continental shelf. Nature, London, 250 (5469), 720–2.Google Scholar
Poole, H. H. & Atkins, W. R. G., 1929–30. Photo-electric measurements of submarine illumi-nation throughout the year. Journal of the Marine Biological Association of the United Kingdom, 16, 297–328.Google Scholar
Riley, G. A., 1956. Oceanography of Long Island Sound, 1952–194. IX Production and utilisation of organic matter. Bulletin of the Bingham Oceanographic Collection, Yale University, 15, 324–44.Google Scholar
Russell, F. S., Southward, A. J., Boalch, G. T. & Butler, E. I., 1971. Changes in biological conditions in the English Channel off Plymouth during the last half-century. Nature, London, 234, 468–70.Google Scholar
Steele, J. H., 1956. Plant production on the Fladen Ground. Journal of the Marine Biological Association of the United Kingdom, 35, 1–33.Google Scholar
Sverdrup, H. U., Johnson, M. W. & Fleming, R. H., 1942. The oceans. Their physics, chemistry and general biology. 1087 pp. New York: Prentice Hall Inc.Google Scholar
Wickstead, J. H., 1968. Temperate and tropical plankton, a quantitative comparison. Journal of Zoology, 155, 253–69.Google Scholar