Predicting Convergence Zone Formation in the Deep Ocean
Convergence zones are formed at discrete range intervals in the ocean provided that certain environmental conditions are satisfied. In order to evaluate the effect of these environmental features on the convergence zone path, the concept of a “depth excess” was developed. Depth excess is defined for a given location as the excess in water depth over that just required for a single ray from the surface to reach the convergence zone. By computing the average depth excess for a given month and location, it is possible to portray various ocean areas as a series of average depth excess contours. Then, by specifying a minimum acceptable depth excess for adequate zone formation, an examination of the monthly average depth excesses in various areas, along with the variability about the average, permits a realistic estimate of the reliability of useful convergence zone formation as a function of month and area.
KeywordsSound Velocity Convergence Zone Ocean Area Bottom Depth Bathymetric Chart
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