The air sea boundary interaction zone is described in terms of nondimensional variables requisite for future experiments. Noise field coherency, rare directional measurements, and unique basin scale computations and methods are presented. The use of satellite measurements in these basin scale models is demonstrated. A series of appendices provides in-depth mathematical treatments which will be of interest to graduate students and active researchers.
Contents:Applications of Natural Ocean Noise:Oceanographic Applications of Natural Sea Surface Sound (W K Melville)Applications of Matched-Phase Noise Reduction to Wind-Wave Generated Noise (B E McDonald & G J Orris)Wind and Precipitation Noise:Laboratory Acoustical Studies of Micro-Scale Sea Surface Activity During Wind and Rain (H Medwin)Ambient Noise Dependence on Local and Regional Wind Speeds (D H Cato et al.)Breaking Waves:New Insights into Breaking Waves and Bubble Entrainment (M S Longuet-Higgins)High Frequency Noise Emitted from Ocean Breaking Waves (P H Dahl)Bubbles:Unresolved Issues in Bubble-Related Ambient Noise (L A Crum)Artificial Bubble Cloud Targets (P A Hwang et al.)Spatial/Temporal Characteristics of Natural Ocean Noise:Source Localization in Noisy Ocean Environments (M D Collins et al.)A Comparison of Deep and Shallow Water Ambient Noise Measurements at Selected Sites Off Western Vancouver Island Using a Multi-Element Vertical Array (P Scrimger et al.)Ice Noise:Acoustical Tracking of Ice Failure Processes (Y-B Xie)Ridge Source Localization Through Matched-Field Processing (P Zakarauskas et al.)and other papers
Readership: Applied physicists.
Acoustic techniques provide the most effective means for remote sensing of ocean and sea floor processes, and for probing the structure beneath the sea floor. No other energy propagates as efficiently in the ocean: radio waves and visible light are severely limited in range because the ocean is a highly conductive medium. However, sound from breaking waves and coastal shipping can be heard throughout the ocean, and marine mammals communicate acoustically over basin scale distances.
The papers in this book indicate a high level of research interest that has generated significant progress in development and application of experimental acoustic inversion techniques. The applications span a broad scope in geosciences, from geophysical, biological and even geochemical research. The list includes: estimation of geotechnical properties of sea bed materials; navigation and mapping of the sea floor; fisheries, aquaculture and sea bed habitat assessment; monitoring of marine mammals; sediment transport; and investigation of natural geohazards in marine sediments.
This book is primarily intended for physicists and engineers working in underwater acoustics and oceanic engineering. It will also be of interest to marine biologists, geophysicists and oceanographers as potential users of the methodologies and techniques described in the book contributions.