The periodwas outstanding in terms of the available energy tomove sediment
and cause large-scale erosionwith the 2-month average significant wave height (Hs) exceeding 3.6m, just
below the 0.95 quantile, and 4 distinct 10-year return period storms with Hs N 9 m. These storm waves caused
unprecedented beach and dune erosion along the Gironde coast, including severely damaged sea defences at
the coastal towns.