COAST-RP: A global COastal dAtaset of Storm Tide Return Periods
datasetposted on 03.06.2021, 08:07 authored by Job DullaartJob Dullaart, S. (Sanne) Muis, Nadia BloemendaalNadia Bloemendaal, Maria Chertova, Anais CouasnonAnais Couasnon, J.C.J.H. (Jeroen) Aerts
Storm surges that occur along low-lying, densely populated coastlines can leave devastating societal, economical, and ecological impacts. To protect coastal communities from flooding, return periods of storm tides, defined as the combination of the surge and tide, must be accurately evaluated. Here we present storm tide return periods using a novel integration of two modelling techniques. For surges induced by extratropical cyclones, we use a 38-year time series based on the ERA5 climate reanalysis. For surges induced by tropical cyclones, we use synthetic tropical cyclones from the STORM dataset representing 10,000 years under current climate conditions. Tropical and extratropical cyclone surge levels are probabilistically combined with tidal levels, and return periods are computed empirically. The COAST-RP dataset contains storm tide levels representing the 1, 2, 5, 10, 25, 50, 100, 250, 500, and 1000-year return period.