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Acoustic intensity fluctuations induced by South China Sea internal tides and solitons

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dc.contributor.author Chiu, Ching-Sang
dc.contributor.author Ramp, Steven R.
dc.contributor.author Miller, Christopher W.
dc.contributor.author Lynch, James F.
dc.contributor.author Duda, Timothy F.
dc.contributor.author Tang, Tswen Yung
dc.date.accessioned 2006-03-16T19:16:39Z
dc.date.available 2006-03-16T19:16:39Z
dc.date.issued 2004-10
dc.identifier.citation IEEE Journal of Oceanic Engineering 29 (2004): 1249-1263 en
dc.identifier.uri http://hdl.handle.net/1912/670
dc.description Author Posting. © IEEE, 2004. This article is posted here by permission of IEEE for personal use, not for redistribution. The definitive version was published in IEEE Journal of Oceanic Engineering 29 (2004): 1249-1263, doi:10.1109/JOE.2004.834173. en
dc.description.abstract Between late April and May 23, 2001, a suite of acoustic and oceanographic sensors was deployed by a team of U.S., Taiwan, and Singapore scientists in the northeastern South China Sea to study the effects of ocean variability on low-frequency sound propagation in a shelfbreak environment. The primary acoustic receiver was an L-shaped hydrophone array moored on the continental shelf that monitored a variety of signals transmitted along and across the shelfbreak by moored sources. This paper discusses and contrasts the fluctuations in the 400-Hz signals transmitted across the shelfbreak and measured by the vertical segment of the listening array on two different days, one with the passage of several huge solitons that depressed the shallow isotherms to near the sea bottom and one with a much less energetic internal wavefield. In addition to exhibiting large and rapid temporal changes, the acoustic data show a much more vertically diffused sound intensity field as the huge solitons occupied and passed through the transmission path. Using a space-time continuous empirical sound-speed model based on the moored temperature records, the observed acoustic intensity fluctuations are explained using coupled-mode physics. en
dc.description.sponsorship This work was supported by the U.S. Office of Naval Research. en
dc.format.extent 1369570 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher IEEE en
dc.relation.uri http://dx.doi.org/10.1109/JOE.2004.834173
dc.subject Intensity fluctuations en
dc.subject Nonlinear internal waves en
dc.subject Shallow water acoustics en
dc.subject South China Sea (SCS) en
dc.title Acoustic intensity fluctuations induced by South China Sea internal tides and solitons en
dc.type Article en
dc.identifier.doi 10.1109/JOE.2004.834173


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