Estimates of exposure times in the Wadden Sea: A comparison of methods

The third approach (HYBRID) was developed by combining the previous two methods. Tidal prediction was obtained from applying a Least Squares Harmonic Analysis on the Sea Level Height (SLH) in the simulation with GETM at every grid point. Moreover, the unpredictable part, e.g. the set-ups or set-downs induced by winds from the North Sea or the European continent, was determined by applying the triangulation method to the wind-induced SLH observed at the tidal gauge stations. This wind-induced SLH was defined as the observed sea level height minus the tidal prediction and its long-term mean value. This combination of methods offers a new approach to determine exposure times in the Wadden Sea more accurately than either method individually.