Drawing from wind and current meter data, an empirical, semiquantitative model has been developed for wind-induced current flow in the New York Bight apex portion of the Hudson Shelf Valley. Data have shown that winds from 270¿T(¿50¿), blowing for at least 9 hours at speeds of greater than 5 m/s, can cause northward (upchannel) bottom flow in the shelf valley at velocities in excess of 40 cm/s. Southern (downchannel) flow is initiated by winds from 75¿T(¿35¿) blowing for at least 6 hours at speeds of 4 m/s or more. Seasonal variation in the wind field results in predominant upchannel flow during October-April with downchannel flow throughout the rest of the year. |