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Communication Dans Un Congrès Année : 2019

ATMOSPHERIC CLIMATE CONTROL OF DIRECTIONAL WAVES IN THE UNITED KINGDOM AND IRELAND

Tim Scott
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Mark Wiggins
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Gerd Masselink
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Andy Saulter
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Résumé

Understanding multi-annual to decadal atmospheric climate controls on winter-wave climate is critical for coastal vulnerability assessment and future development of 'season ahead' forecasting of coastal risk. We examine the relationships between winter-average climate indices (NAO and WEPA) and directional wave power at 63 inshore locations throughout the United Kingdom and Ireland (UK&I). Analysis of hindcast wave data between 1980-2017 illustrate the extent of directional bi-modality, with 67% of inshore sites displaying directionally multimodal wave climates. Analysis of directional modes as a function of climatic indices illustrated the control exerted by NAO/WEPA on directional balance of inshore winter wave climate. Along Channel and southern North Sea coasts +WEPA significantly explains winter-averaged wave power for southwesterly wave directional modes (r = 0.58-0.77) and-NAO significantly explains variability in all easterly wave modes (r = 0.6-0.76), providing a mechanism for which 'season ahead' inshore wave climate forecasting and rotational beach response can be based.

Domaines

Océanographie
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Dates et versions

hal-02394968 , version 1 (11-12-2019)

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Tim Scott, Mark Wiggins, Gerd Masselink, Bruno Castelle, Guillaume Dodet, et al.. ATMOSPHERIC CLIMATE CONTROL OF DIRECTIONAL WAVES IN THE UNITED KINGDOM AND IRELAND. Coastal Sediments'19, May 2019, Tampa, United States. ⟨10.1142/9789811204487_0063⟩. ⟨hal-02394968⟩
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