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Monthly-mean residual flows through the Dover Strait, 1949–1972

Published online by Cambridge University Press:  11 May 2009

D. Prandle
D. Prandle
Affiliation:
Institute of Oceanographic Sciences, Bidston Observatory, Merseyside
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Extract

An estimate is made of the mean value of residual flow through the Dover Strait for each month over the 24–year period from 1949 to 1972. The estimates are based on results from a modelling investigation by Prandle (1978) where it was shown that the residual flow consists of three components, (a) a tidal residual, (b), a wind-driven residual and (c) a flow due to a long-term gradient in mean sea level. The components (a) and (c) are assumed to be constant and the value of (b) is deduced using wind data recorded by Dutch Light Vessels located in the southern North Sea.

The mean flow over the whole period amounts to 155 × 103 m3 s–1 into the North Sea with a maximum value of 364 x 103 m3 s–1 and a minimum of – 15 × 103 m3 s–1 (out of the North Sea). One notable feature of the complete time series is the surprisingly small variation in the annual mean flows; perhaps this stability in the annual flow is of significance to the marine biology of the area.

The validity of the computed time series is established by reference to comparable data including a 9–year record, from cross-channel submarine cables, of the potential induced by the flow of water through the Earth's magnetic field. Additional comparisons are also made with the results of a previous study of daily-mean flows.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 58 , Issue 4 , November 1978 , pp. 965 - 973
Copyright
Copyright © Marine Biological Association of the United Kingdom 1978

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References

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