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dc.contributor.advisorHerbers, Thomas H. C.
dc.contributor.advisorMacMahan, Jamie H.
dc.contributor.authorJohnston, Carter L.
dc.dateDec-14
dc.date.accessioned2015-02-18T00:17:47Z
dc.date.available2015-02-18T00:17:47Z
dc.date.issued2014-12
dc.identifier.urihttp://hdl.handle.net/10945/44589
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.abstractRogue waves have presented unpredictable, dire hazards to mariners since the dawn of seafaring. Even in benign seas, isolated rogue waves can severely endanger ships and crews, even accounting for their disappearance. Better understanding of rogue wave generation will enhance safety of maritime operations. This study examines surface height data from wave resolving drifters (WRDs) deployed in groups of 30–50 in the Mouth of the Columbia River (MCR) during the peak of ebb tide in May and June of 2013. Over three separate collection days, effects of opposing currents and bathymetry on swell and wind waves were analyzed as WRDs headed to sea from the MCR. Wave significance was identified based on the local sea state within 1 km of the drifter location. Wave height histograms were calculated from regional wave ensembles and compared with the theoretical Rayleigh distribution of a narrow band, Gaussian wave field. Generally, wave height data in the MCR follow Rayleigh distribution well. Areas over shallower bathymetry of the MCR Bar and predominant waves from the west create intense sea state amplification and rogue wave occurrence, and right-tail deviation from the Rayleigh pdf. Isolated extreme waves and trains of large waves were observed on the Bar.en_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_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.titleExtreme wave statistics within the Mouth of the Columbia Riveren_US
dc.typeThesisen_US
dc.contributor.departmentOceanography
dc.subject.authorRIVET IIen_US
dc.subject.authorExtreme Wavesen_US
dc.subject.authorRogue Wavesen_US
dc.subject.authorHistogramen_US
dc.subject.authorNonlinearen_US
dc.subject.authorWRDen_US
dc.subject.authorWave Buoysen_US
dc.subject.authorAwesomeen_US
dc.subject.authorAmazingen_US
dc.subject.authorMouth of Columbia Riveren_US
dc.subject.authorMCRen_US
dc.subject.authorBar.en_US
dc.description.serviceLieutenant Commander, United States Navyen_US
etd.thesisdegree.nameMaster of Science in Meteorology and Physical Oceanographyen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMeteorology and Physical Oceanographyen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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