Effect of air-sea temperature difference on the momentum exchange between air and sea for fetch-limited cases

The atmospheric boundary layer over sea surface is simplified as mixed convection of turbulent boundary layer flow over a horizontal plate, and the momentum exchange between wind and waves is also included in the model.Effeels of wind speed, air-sea temperature difference gnd fetch on the momentum exchange between air and sea are revealed.The turbulence model used in calculating boundary layer is an extended versmn of the Van Driest mixing length model, and a combined theoretical and semi-empirical approach is employed in estimating the effect of ocean waves.For fetch-limited cases, i.e.wind blows off sea shore for a limited distance, fetch plays a fundamental role in the air-sea momentum exchange under different air-sea temperature conditions, which is not discussed in previous studies.