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Ocean Variability & Acoustic Propagation
The time-varying aspect of the ocean makes descriptive oceanography a four-dimensional problem, with spatial scales from 10'7 to 10'-3 m and energy cascading down over ten orders of magnitude. In-situ sensing alone is ultimately unable to provide a sufficient description. The ocean is fundamentally opaque to electromagnetic radiation, but this limitation on information transfer is largely commpensated by its ability to propagate compressional energy over thousands of kilometers. Sound, Then, is the only natural communication mechanism in the ocean, be it for geophysical surveying, whale song or remote sensing of ocean structure. Conversely, the acoustician needs to know the ocean structure if he wishes to accurately predict an acoustic field, a seven-dimensional problem. In Ocean Variability & Acoustic Propagation the editors have assembled a book that presents the very latest results relating the propagation of sound through the oceans to the oceanic structure. The book consists of five parts, reflecting the sessions held at the workshop on which it is based : Session 1 : Experimental results relating acoustic and oceanographic variability, Sessions 2 : Wave motion and fine structure affecting acoustic propagation-small-scale variability, Session 5 : Stochastic modelling in oceanography and acoustics, Session 3 : Range-dependent acoustic propagation caused by fronts and eddies-meso-scale variability, Session 4 : Coupling acoustic and oceanographic models.
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