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    Acoustic scattering from density and sound speed gradients : modeling of oceanic pycnoclines

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    JAS00EL54.pdf (1.059Mb)
    Date
    2011-12-20
    Author
    Ross, Tetjana  Concept link
    Lavery, Andone C.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5064
    As published
    https://doi.org/10.1121/1.3669394
    DOI
    10.1121/1.3669394
    Keyword
     Acoustic wave scattering; Acoustic wave velocity; Hydrophones; Oceanographic equipment; Oceanographic techniques; Remote sensing; Sonar; Underwater sound 
    Abstract
    A weak-scattering model that allows prediction of acoustic scattering from oceanic pycnoclines (and the accompanying sound speed gradients) based on hydrographic profiles is described. Model predictions, based on profiles from four locations, indicate that scattering from oceanic pycnoclines is measurable using standard scientific sonars operating at frequencies up to 200 kHz but generally only for pycnocline thicknesses less than 10 m. Accurate scattering models are key to assessing whether acoustic remote sensing can be used to map oceanic pycnoclines and for determining whether scattering from pycnoclines needs to be taken into account when estimating, for instance, zooplankton abundance from acoustic data.
    Description
    Author Posting. © Acoustical Society of America, 2012. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 131 (2012): EL54-EL60, doi:10.1121/1.3669394.
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Journal of the Acoustical Society of America 131 (2012): EL54-EL60
     

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