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Woods Hole Oceanographic Institution


Figure 1.  Stresses estimated from the 2007 measurements at the Martha’s Vineyard Coastal Observatory.  The directly measured hour-averaged Reynolds shear stress  agrees well with the drag-law estimate inferred from the measured burst-averaged velocity by means of an empirically determined drag coefficient  .  The standard deviation of the oscillatory bottom shear stress produced by surface waves is inferred from a wave-current interaction model and is much larger than the hour-averaged stress , which is associated with wind-driven and tidal currents.  The wave-induced stress is primarily responsible for suspending particles and controlling the size of water-borne flocs.

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