Euro-Atlantic teleconnection patterns, weather regimes and inter-annual shoreline variability at a high-energy sandy beach

• Main Authors: Robinet, Arthur, Castelle, Bruno, Marieu, Vincent, Idier, Déborah, Le Cozannet, Gonéri, Charles, Elodie, Déqué, Michel, Splinter, Kristen D.
• Other Authors: Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Groupe d'étude de l'atmosphère météorologique (CNRM-GAME), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), Water Research Laboratory (WRL), University of New South Wales Sydney (UNSW)-School of Civil and Environmental Engineering, Bourse Carnot, ANR-14-ASTR-0004,CHIPO,Processus cross-shore et longshore combinés en morphodynamique littorale(2014)
• Format: Other/Unknown Material
• Language: English
• Published: HAL CCSD 2016
• Subjects: Teleconnexion patterns; Weather regimes; Shoreline changes; Interannual variability; geo; envir; Sandy Beach; Splinter; North Atlantic
• Online Access: https://hal.archives-ouvertes.fr/hal-01260849

International audience On coasts dominated by cross-shore sediment-transport, incident wave-energy primarily controls temporal shoreline variability (Splinter et al., 2014). Truc Vert beach (SW France) is a high-energy meso-macrotidal multiple-barred beach where monthly to bimonthly surveys have been performed since May 1998. Surveys with an alongshore coverage larger than 350 m (from May 2005 to May 2014) are used to calibrate an equilibrium shoreline model (Castelle et al., 2014). The calibrated model explains 66% of the observed shoreline variability over the calibration period. Over the entire survey period (1998-2014), the model skilfully reproduces the observed shoreline evolution patterns. Especially, the intra-annual shoreline variability driven by the seasonal wave climate as well as shoreline response to individual storms and storm groups are well reproduced. A significant shoreline inter-annual variability (blue arrows in Figure 1) is also found, which is likely driven by the climate variability over the North Atlantic Ocean.