Abstract
In July 1989, the Marine Physical Laboratory carried out a downslope conversion experiment in the region of the continental margin NW of Pt. Conception, CA. These carefully controlled and well‐documented measurements of downslope signal propagation were made to study the physics of downslope propagation, which has been suggested as one mechanism by which acoustic energy from surface sources such as storms and shipping traffic gets coupled into the sound channel [e.g., R. A. Wagstaff, J. Acoust. Soc. Am. 69, 1009–1004 (1981)]. At long distance, this downslope converted energy is seen as a large contribution to the ambient noise level arriving near the horizontal. This paper will discuss the downslope conversion experiment and will compare the observed vertical arrival structure from a source in deep water and a source traveling across the continental margin. [Work supported by ONR.]
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