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dc.contributor.authorElgar, Steve
dc.contributor.authorRaubenheimer, Britt
dc.date.accessioned2010-04-29T14:21:16Z
dc.date.available2010-04-29T14:21:16Z
dc.date.issued2008-04-12
dc.identifier.citationGeophysical Research Letters 35 (2008): L07611en_US
dc.identifier.urihttp://hdl.handle.net/1912/3358
dc.descriptionAuthor Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 35 (2008): L07611, doi:10.1029/2008GL033245.en_US
dc.description.abstractMuddy seafloors cause tremendous dissipation of ocean waves. Here, observations and numerical simulations of waves propagating between 5- and 2-m water depths across the muddy Louisiana continental shelf are used to estimate a frequency- and depth-dependent dissipation rate function. Short-period sea (4 s) and swell (7 s) waves are shown to transfer energy to long-period (14 s) infragravity waves, where, in contrast with theories for fluid mud, the observed dissipation rates are highest. The nonlinear energy transfers are most rapid in shallow water, consistent with the unexpected strong increase of the dissipation rate with decreasing depth. These new results may explain why the southwest coast of India offers protection for fishing (and for the 15th century Portuguese fleet) only after large waves and strong currents at the start of the monsoon move nearshore mud banks from about 5- to 2-m water depth. When used with a numerical nonlinear wave model, the new dissipation rate function accurately simulates the large reduction in wave energy observed in the Gulf of Mexico.en_US
dc.description.sponsorshipThe Office of Naval Research provided support.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttp://dx.doi.org/10.1029/2008GL033245
dc.subjectWave dissipationen_US
dc.subjectMuddy seaflooren_US
dc.subjectCoastal processesen_US
dc.titleWave dissipation by muddy seafloorsen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2008GL033245


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