Exchange of momentum between atmosphere and ocean in coastal areas

In order to describe the physical processes in the wadden sea environment a coupled system of models for fetch limited areas is developed. Three models, a meteorological mesoscale model (GESIMA resp MKW), a shallow water wave model (HYPAS) and a current and water level model (NFMOD) are coupled iteratively. The influence of the periodic change of the water level due to tides on the local wind field is investigated as well as the interaction between waves and local wind field. Two different parameterizations are used to describe the exchange of momentum between atmosphere and ocean. The coupled system of models is applied to the Lister Tidebecken in order to simulate wind, waves and water levels. A better agreement of model results and measurements of the significant wave height in coastal areas is achieved by taking into account the local wind field. (orig.). 54 figs., 1 tab