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Downscaling effects on modelling waves, tides and storm surge

Chen, Yongping, Pan, Shunqi, Wolf, Judith and Du, Yanliang 2010. Downscaling effects on modelling waves, tides and storm surge. Proceedings of the International Conference on Coastal Engineering 32 , waves.33.

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Abstract

This paper presents the results of downscaling effects when modelling waves, tides and storm surge using a nested modelling system. In this study, the coupled POLCOMS/ProWAM models are used, with 3 nested computational domains, the largest of which covers part of north-eastern Atlantic Ocean with a coarse resolution grid and the smallest covers the surrounding waters of south-west Cornish coast of the UK with a finer resolution grid. Applying the identical surface wind forcing to all 3 computational domains and the wave and tide boundary conditions provided from the coarse to finer domains, the computed wave heights, tides and surge levels are examined at selected locations to study the downscaling effects. The results show that downscaling could considerably increase accuracy of model predictions in the local domain. For the particular test conditions used in the present study, 3-level and 2-level downscaling produces similar results in the local domain. The results also indicate that downscaling with reduction of grid resolution by 6 times is acceptable for the study site.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TC Hydraulic engineering. Ocean engineering
Uncontrolled Keywords: downscaling effect; nested model; wave, tide and surge modelling; POLCOMS; WAM; ProWAM; Celtic Sea
Additional Information: Proceedings of 32nd Conference on Coastal Engineering, Shanghai, China, 30 June - 5 July 2010. Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/2156-1028/ (accessed 24/04/2014).
Publisher: Coastal Engineering Research Council
ISSN: 2156-1028
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 04:13
URI: http://orca-mwe.cf.ac.uk/id/eprint/34911

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