ANALYSIS OF DIFFUSION OF DYE PATCHES IN THE OCEAN.
LAMONT GEOLOGICAL OBSERVATORY PALISADES N Y
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The data of dye patch experiments made off New Jersey and on the Bahama Banks are analyzed. The second moment of the concentration distribution increases with square of time in the initial stage and with cube of time later, in agreement with a theory of a two-particle problem. In order to explain the curved trailing part of the dye patches, refraction of a submerged object is treated theoretically. It is found that the effect of refraction may cause a curved image, but the curvature due to refraction is much smaller than actually observed. The vertically differential advection as the main cause of the curved pattern is treated analytically, and the result is applied to computing vertical eddy viscosity from the observed curved trailing portion of dye patches. The mechanism of striated patterns of dye patches is discussed from the point of view of hydrodynamic instability and of rolling up of streak lines. Author