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    Nonlinear generation and loss of infragravity wave energy

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    2006JC003539.pdf (267.3Kb)
    Date
    2006-12-08
    Author
    Henderson, Stephen M.  Concept link
    Guza, R. T.  Concept link
    Elgar, Steve  Concept link
    Herbers, T. H. C.  Concept link
    Bowen, A. J.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3588
    As published
    https://doi.org/10.1029/2006JC003539
    DOI
    10.1029/2006JC003539
    Keyword
     Infragravity waves; Nearshore; Nonlinear waves 
    Abstract
    Nonlinear energy transfers with sea and swell (frequencies 0.05–0.40 Hz) were responsible for much of the generation and loss of infragravity wave energy (frequencies 0.005–0.050 Hz) observed under moderate- and low-energy conditions on a natural beach. Cases with energetic shear waves were excluded, and mean currents, a likely shear wave energy source, were neglected. Within 150 m of the shore, estimated nonlinear energy transfers to (or from) the infragravity band roughly balanced the divergence (or convergence) of the infragravity energy flux, consistent with a conservative energy equation. Addition of significant dissipation (requiring a bottom drag coefficient exceeding about 10−2) degraded the energy balance.
    Description
    Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 111 (2006): C12007, doi:10.1029/2006JC003539.
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    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Journal of Geophysical Research 111 (2006): C12007
     

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