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On the sensitivity of computed higher tidal harmonics to mesh size in a finite element model

Jones, J. E.; Davies, A. M.. 2007 On the sensitivity of computed higher tidal harmonics to mesh size in a finite element model. Continental Shelf Research, 27 (14). 1908-1927. 10.1016/j.csr.2007.03.007

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Abstract/Summary

A finite element model of the Irish and Celtic Sea regions with a range of grid resolutions is used to examine the influence of resolution upon the higher harmonics of the tide in the region. Comparisons are also made with published results from finite difference models of the area, and observations. Calculations using fine near-shore elements with non-zero water depths in coastal regions were found to be more accurate and less time consuming than those using a zero coastal water depth. A detailed examination of the spatial variability of the higher harmonics in near-shore regions of the eastern Irish Sea particularly the Solway and Morecambe Bay showed significant small-scale variability. This together with the variation in higher harmonics in the eastern Irish Sea and adjacent estuaries, clearly shows the need for an unstructured grid model of the region that can include the estuaries. To match the high resolution of the model in near-shore regions accurate high-resolution topography is required

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.csr.2007.03.007
Programmes: Oceans 2025 > Integration of sustained observations
ISSN: 0278-4343
Additional Keywords: HIJ ISI REF THEME 9 AJWOCT07 JOURNAL OPM2007 NISCOCT07 AR0708 POLIRISH IRISH SEA TIDAL MODELS TIDAL HARMONICS FINITE ELEMENT METHOD MESH RESOLUTION UK CELTIC SEA SOUTH ATLANTIC BIGHT 3-DIMENSIONAL MODEL TAGUS ESTUARY NORTH CHANNEL WEST COAST O-1 TIDES RESOLUTION SHELF GENERATION
NORA Subject Terms: Marine Sciences
Date made live: 13 Oct 2008 11:23
URI: http://nora.nerc.ac.uk/id/eprint/2669

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