| Three-dimensional finestructure and vertical microstructure in thermohaline intrusions. | |
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MedLine Citation:
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PMID: 20330944 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Thermohaline intrusions have intrigued physical oceanographers since the first XBT section was published by Spilhaus in 1939. Characterized by vertical gradients of temperature and salinity having compensating density effects, intrusions are meters to tens of meters thick and extend laterally for hundreds of meters to many kilometers. Boundaries often have TS staircases produced by salt fingering or diffusive layering. Large diapycnal fluxes have been inferred from sections showing intrusions sloping across isopycnals, but these inferences are questionable, as isopycnal movements can give the illusion of diapycnal motion. To address these issues, in 2007 we used a depth-cycling towed body, a neutrally buoyant Lagrangian float, and microstructure profilers to map and follow intrusions in the subtropical front north of Hawaii. All intrusions were connected to the front, i.e., none was isolated lenses, some as long, thin folds, and others resembled tongues. About 10 m thick, the sheets protruded 10 km into the warm, saline side of the front, were coherent laterally for 10-30 km, and lasted at least 1 week, evolving at both inertial (23 h) and sub-inertial ( approximately 10 day) time scales. They appeared to be formed by advective deformation of the front driven by sub-mesoscale two-dimensional motions. |
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Authors:
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Michael C Gregg; Andrei Y Shcherbina; Matthew H Alford; Ramsey R Harcourt |
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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: 1972 Citation Subset: IM |
Affiliation:
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522 Henderson Hall, Univ. Washington, 1013 NE 40th St., Seattle, WA 98105Univ. Washington, Seattle, WA 98105. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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