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Tidally induced mean flow over bathymetric features: a contemporary challenge for high-resolution wide-area models

Polton, Jeff A. 2015 Tidally induced mean flow over bathymetric features: a contemporary challenge for high-resolution wide-area models [in special issue: The dynamics of shelf seas Special Issue] Geophysical & Astrophysical Fluid Dynamics, 109 (3). 207-215. 10.1080/03091929.2014.952726

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Abstract/Summary

Huthnance [Estuarine CoastalMar. Sci. 1973, 1, 89–99] is reviewed, whereby an oscillating tide over bathymetric features induces a mean flow generally along isobaths. The effect is a superposition of Coriolis and frictional processes. These are discussed with the intention of elucidating the processes for a more general readership. Induced velocities of order several cm/s are expected around the UK shelf seas. The effect is dynamically significant over bathymetric scales of order a few kilometres and has previously been of most interest to dynamicists studying processes on this scale. However, with the increase in computing power, appropriate scales can be simulated in shelf-wide regional models and in next generation operationalmodels. It is demonstrated that this small-scale effect is likely to be important for shelf-wide regionalmodels and that a spatial resolution of at least 1.8km is recommended for shelf sea simulations.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1080/03091929.2014.952726
Programmes: NOC Programmes > Marine Systems Modelling
Additional Keywords: Regional model; Resolution; Tides; Tidal residual; Bathymetry; Tidal excursion
NORA Subject Terms: Earth Sciences
Marine Sciences
Date made live: 30 Sep 2014 13:06 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/508501

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