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dc.contributor.authorReniers, A.J.H.M.
dc.contributor.authorMacMahan, J.H.
dc.contributor.authorThornton, E.B.
dc.contributor.authorStanton, T.P.
dc.date.accessioned2015-08-11T23:52:54Z
dc.date.available2015-08-11T23:52:54Z
dc.date.issued2007
dc.identifier.urihttp://hdl.handle.net/10945/45997
dc.description.abstractNumerical computations are used to explain the presence of Very Low Frequency motions (VLF's), with frequencies less than 0:004 Hz, in the rip current velocity signals observed during the RIPEX ¯eld experiment. Observations show that the VLF-motions are most intense within the surfzone and then quickly taper o® in the o®shore direction. By comparing computed VLF-intensity (Urms;vlf ) distributions in both the cross-shore and alongshore direction with observations in a qualitative sense, the most important contributions to the VLF-dynamics are established. VLF-motions at neighboring rip-channels are seen to interact in the computations, with stronger surfzone intensity for increasing bathymetric variation. The intermittent forcing by spatially varying wave-groups is essential in obtaining the correct Urms;vlf distribution in the cross-shore direction suggesting this is the predominant mechanism responsible for the generation of the VLF-motions observed during RIPEX. Computations also suggest that VLF-motions can occasionally propagate o®shore but are mostly con¯ned to the surfzone corresponding to surfzone eddies.en_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.titleModeling of very low frequency motions during RIPEXen_US
dc.typeArticleen_US
dc.contributor.departmentOceanographyen_US


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