Abstract
The feasibility of acoustic monitoring of generation and evolution of shallow-water solitary internal waves is investigated by using the acoustic and environmental data collected during the 1995 Shallow Water Acoustics in a Random Medium (SWARM) experiment. Spatial and temporal variability of acoustic signals (60 to 450 Hz) were measured by using two well-populated vertical receiving arrays at 30- and 40-km ranges from two moored sources and at 20-km cross-range from two ship-deployed sources. Environmental data were collected by using CTDs, thermistor strings, a high-frequency acoustic backscattering imaging system, and a chirp sonar system. Correlation between cross-range propagation and oceanographic measurements during the generation and evolution of a solitary internal wave packet indicates the possibility of acoustic monitoring of this oceanographic process. Results of a parametric study using broadband numerical simulations are also presented to develop the best monitoring strategies for future experiments. [Work supported by ONR.]
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