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dc.contributor.authorStashchuk, Nataliya
dc.contributor.authorVlasenko, Vasyl
dc.date.accessioned2015-11-28T17:51:59Z
dc.date.available2015-11-28T17:51:59Z
dc.date.issued2009-01-09
dc.identifier.issn0148-0227
dc.identifier.issn2169-9291
dc.identifier.otherC01004
dc.identifier.urihttp://hdl.handle.net/10026.1/3851
dc.description.abstract

The generation of internal waves by a propagating river plume is studied in the framework of a fully nonlinear nonhydrostatic numerical model. The vertical fluid stratification, parameters of tide, river discharge, and the bottom topography were taken close to those observed near the Columbia River mouth. It was found that in the beginning of the ebb tidal phase the river water intruding into the sea behaves as a surface jet stream. It collides with the stagnant shelf waters and sinks down in the area of the outer plume boundary, forming a head of the gravity current. In supercritical conditions which are normally realized at the first stage of the ebb tidal phase, internal waves are arrested in the head of the gravity current because their phase speed is smaller than the velocity of the plume. They are released and radiate from the plume when the speed of the decelerating front becomes smaller than the internal wave phase speed. This mechanism of the wave generation is sensitive to the stratification of the ambient shelf waters. It was found that dramatic decay of the buoyancy frequency profile from the surface to the bottom provides the most favorable conditions for the efficient disintegration of the head of the gravity current into a packet of internal waves and their fast separation from the plume. In the case when the fluid stratification on the shelf is close to monotonous, the disintegration of the head of the gravity current into a packet of solitary internal waves is not expected. Copyright 2009 by the American Geophysical Union.

dc.languageen
dc.language.isoen
dc.publisherAmerican Geophysical Union (AGU)
dc.titleGeneration of internal waves by a supercritical stratified plume
dc.typejournal-article
dc.typeJournal Article
plymouth.author-urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000262382800002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.issueC1
plymouth.volume114
plymouth.publication-statusPublished online
plymouth.journalJournal of Geophysical Research
dc.identifier.doi10.1029/2008jc004851
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Biological and Marine Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.identifier.eissn2169-9291
dc.rights.embargoperiodNot known
rioxxterms.funderNatural Environment Research Council
rioxxterms.identifier.projectA New Mechanism for Generation of Internal Waves
rioxxterms.versionofrecord10.1029/2008jc004851
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
plymouth.funderA New Mechanism for Generation of Internal Waves::Natural Environment Research Council


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