DWD GeoServer WMS - Numerical Swell Prediction (WAM)

This is the Web Map Server of DWD.:The basis of the numerical swell prediction system in the German Weather Service (DWD) is a spectral swell model of the 3rd generation (3G-WAveModel). Spectral models describe the state of swell over the so-called frequency-direction swell spectrum - this is the 2-dimensional distribution of wave energy according to wave frequency (or wave period or wave number) and propagation direction. In the current version, a resolution of 36 directions and 30 frequencies (wave periods between 1.5 and 24 seconds) is used. In the numerical model, the temporal evolution of the sea state spectrum is calculated at a variety of points of a grid stretched over the sea surface. The wave energy changes through the following physical processes: . Wave growth due to downward momentum flow from the wind field. Wave kinematics (advection, refraction). redistribution of energy between wave numbers by nonlinear interactions. Dissipation (internal friction and wave breaking) Similar to the chain of atmospheric models (ICON, ICON-EU and ICON-D2), the sea state prediction system is divided into different prediction areas: The global model GWAM, the European model EWAM and the high-resolution coastal model CWAM. The model sea dynamism is driven by analyzed and predicted 10m winds of the atmospheric models.