Abstract
The transport and diffusion of drifter litters are affected by surface current dominantly. Therefore, it is very important to predict the surface current in order to collect these litters quickly. By using the HFRs surface current data and ocean wind data, we analyzed the characteristics of surface current in Tokyo Bay. By comparison with the non-tidal component of sea surface current and ocean wind, the non-tidal components of sea surface current are strongly influenced by ocean wind. Especially, the magnitude of the influence in summer is larger than in winter and the affected currents have 20-40° deflection angle from wind direction. Furthermore, we revealed that the sea current circulation is influenced by ocean wind by comparison with both surface current and ocean wind vorticities.
