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Publications
Ponce de Leon, S., Bettencourt, J., Leclercqd, L., Cazenave, A. and Benveniste, J. (2024), Wave contribution to sea level in the French Facade over 2002-2021 inferred from high-resolution simulations and tide gauges observations, 30 Years of Progress in Radar Altimetry Symposium (30YPRA), 2-7 September, Montpellier, France
Interactions between the mean sea level and waves in coastal zone might be non-negligible and still not yet well understood. The objective of the present study is to estimate the relative contribution of wind-generated waves to coastal sea level trend. We use observations (wave buoys and tide gauges data) and coastal high-resolution spectral wave modelling (SWAN Booij et al., 1999) to estimate trends between 2002-2021. The sea level trends were estimated using the tide gauges and the Hs trends were estimated from the wave buoy data distributed by Copernicus Marine Service (CMEMS) and from numerical wave simulations. We estimate the Hs and wave setup trends to conclude whether wave setup contributes to the coastal sea level trend. The correlation between Hs, wave setup and sea level trends is analyzed to understand if it increases near the coast and if there is a direct relation between the changes in wave conditions and the sea level variations. Presently this investigation is still under development including nesting of an unstructured grid and considering tidal currents. Local coastal processes, such as shoaling will be analyzed as one that could lead to sea level variations.
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