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Pré-Publication, Document De Travail Année : 2022

Accuracy of numerical wave model results: Application to the Atlantic coasts of Europe

Résumé

Abstract. Numerical wave models are generally less accurate in the coastal ocean than offshore. It is generally suspected that a number of factors specific to coastal environments can be blamed for these larger model errors: complex shoreline and topography, relatively short fetches, combination of remote swells and local wind seas, less accurate wind fields, presence of strong currents, bottom friction, etc. These factors generally have strong local variations, making it all the more difficult to adapt a particular model setup from one area to another. Here we investigate a wide range of modelling choices including forcing fields, spectral resolution and parameterizations of physical processes in a regional model that covers most of the Atlantic and North Sea coasts. We show that the accurate propagation of waves from offshore is probably the most important factor on exposed shorelines, while other specific effects can be important locally, including winds, currents and bottom friction.

Dates et versions

hal-03846379 , version 1 (10-11-2022)

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Matias Alday, Fabrice Ardhuin, Guillaume Dodet, Mickael Accensi. Accuracy of numerical wave model results: Application to the Atlantic coasts of Europe. 2022. ⟨hal-03846379⟩
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