| Depth-profiling ambient noise in the deep ocean. | |
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MedLine Citation:
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PMID: 20330197 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Deep Sound is an untethered instrument platform designed to free-fall from the sea surface to a preassigned depth, at which point a burn wire releases a weight, allowing the system to return to the surface under buoyancy. The descent and ascent rate is 0.6 ms. A Vitrovex glass sphere houses lithium-ion batteries and a suite of microprocessor-controlled electronics for data acquisition, data storage, power management, and system control. Outside the sphere, several hydrophones are arranged in vertical and horizontal configurations, a CTD returns environmental data, and motion sensors monitor pitch, roll, and yaw. Data may be downloaded, and the batteries may be recharged, via throughputs in the sphere. The hydrophones, with a bandwidth of 30 kHz, are rated to a depth exceeding 11 km, and the sphere itself has a depth-rating of 9 km. The system made three descents in the Philippine Sea in May 2009, to depths of 5100, 5500 and 6000 m; and in November 2009, two descents were made in the Mariana Trench to a depth of 9000 m. On all these deployments, ambient-noise time-series were recorded continuously, yielding the power spectrum and vertical coherence of the noise as functions of depth. [Research supported by ONR.]. |
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Authors:
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David R Barclay; Fernando Simonet; Michael J Buckingham |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 127 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 1783 Citation Subset: IM |
Affiliation:
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Scripps Inst. of Oceanogr., UCSD, 9500 Gilman Dr., La Jolla, CA 92093-0238, mbuckingham@.ucsd.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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