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dc.contributor.authorReniers, A.J.H.M.
dc.contributor.authorMacMahan, J.H.
dc.contributor.authorThornton, E.B.
dc.contributor.authorStanton, Timothy 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. Copyright protection is not available for this work in the United States.en_US
dc.titleModeling of very low frequency motions during RIPEXen_US
dc.typeArticleen_US
dc.contributor.departmentOceanographyen_US


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