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    Generation of internal solitary waves by lateral circulation in a stratified estuary

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    jpo-d-16-0240.1.pdf (925.6Kb)
    Date
    2017-07-03
    Author
    Xie, Xiaohui  Concept link
    Li, Ming  Concept link
    Scully, Malcolm E.  Concept link
    Boicourt, William C.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/9142
    As published
    https://doi.org/10.1175/JPO-D-16-0240.1
    DOI
    10.1175/JPO-D-16-0240.1
    Keyword
     Estuaries; Internal waves; Solitary waves 
    Abstract
    Internal solitary waves are commonly observed in the coastal ocean where they are known to contribute to mass transport and turbulent mixing. While these waves are often generated by cross-isobath barotropic tidal currents, novel observations are presented suggesting that internal solitary waves result from along-isobath tidal flows over channel-shoal bathymetry. Mooring and ship-based velocity, temperature, and salinity data were collected over a cross-channel section in a stratified estuary. The data show that Ekman forcing on along-channel tidal currents drives lateral circulation, which interacts with the stratified water over the deep channel to generate a supercritical mode-2 internal lee wave. This lee wave propagates onto the shallow shoal and evolves into a group of internal solitary waves of elevation due to nonlinear steepening. These observations highlight the potential importance of three-dimensionality on the conversion of tidal flow to internal waves in the rotating ocean.
    Description
    Author Posting. © American Meteorological Society, 2017. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 47 (2017): 1789-1797, doi:10.1175/JPO-D-16-0240.1.
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    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Journal of Physical Oceanography 47 (2017): 1789-1797
     

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