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Circulation, Hydrographic Structure and Mixing at Tidal Fronts: The View from Georges Bank [and Discussion]

John W. Loder, Kenneth F. Drinkwater, Neil S. Oakey, Edward P. W. Horne, J. M. Huthnance, B. S. McCartney and D. Prandle
Philosophical Transactions: Physical Sciences and Engineering
Vol. 343, No. 1669, Understanding the North Sea System (Jun. 15, 1993), pp. 447-460
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/54045
Page Count: 14
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Circulation, Hydrographic Structure and Mixing at Tidal Fronts: The View from Georges Bank [and Discussion]
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Abstract

The steep slope on the northern side of Georges Bank and its location in the Fundy-Maine tidal system result in a persistent summertime frontal system comprising a tidal-mixing front and a stratified tide-topography interaction at the Bank edge. Recent field studies have provided a high-resolution description of the circulation, hydrographic structure and mixing in the region. Frontal features include an along-front residual jet, a surface convergence zone, regular variations in frontal structure and position over the tidal period and tidal modulation cycle, large-amplitude internal waves, and strong spatial and temporal variations in small-scale turbulence. The observations suggest that the magnitude of cross-front and vertical exchange in frontal regions can be site-specific depending on the relative importance of the underlying physical processes.

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