Author(s)

P. Daniel, P. Josse, V. Ulvoas

Abstract

Atmopheric forcing impact study in Meteo France storm surge model P. Daniel, P. Josse & V. Ulvoas Abstract A depth-averaged, numerical storm-surge model has been developed and configured to provide storm-surges forecasts along coastlines of France. The primary data requirement for modelling storm surges is accurate surface wind and atmospheric pressure fields, in particular in the vicinity of maximum winds. These fields are taken from atmospheric numerical models: IPS (European Center for Medium Range Weather Forecasts), ARPEGE and ALADIN (Meteo- France). The system has been operated since October 1999. One particular case is studied: a severe storm that hit Atlantic coast of France on December 27*, 1999. Storm surges forecasts were lower than observations. The effect of both spatial and temporal interpolation of wind is investigated. Spatial interpolation on wind components from the atmospheric model grid to the storm surge model grid leads to a loss of energy. Spatia

Keywords