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dc.contributor.authorCarr, Magda
dc.contributor.authorDavies, Peter
dc.contributor.authorHoebers, Ruud
dc.identifier.citationCarr , M , Davies , P & Hoebers , R 2015 , ' Experiments on the structure and stability of mode-2 internal solitary-like waves propagating on an offset pycnocline ' , Physics of Fluids , vol. 27 , no. 4 , 046602 .
dc.identifier.otherPURE: 182355532
dc.identifier.otherPURE UUID: b9c64183-1c81-477f-a634-d09f47e9795c
dc.identifier.otherScopus: 84927749946
dc.identifier.otherWOS: 000353835700036
dc.description.abstractThe structure and stability of mode-2 internal solitary-like waves is investigated experimentally. A rank-ordered train of mode-2 internal solitary waves is generated using a lock release configuration. The pycnocline is centred either on the mid-depth of the water column (the 0% offset case) or it is offset in the positive vertical direction by a fraction of 5%, 10% or 20% of the total fluid depth. It is found that offsetting the pycnocline has little effect on the basic wave properties (e.g wave speed, wave amplitude and wave length) but it does significantly affect wave stability. Instability takes the form of small K-H-like billows in the rear of the wave and small scale overturning in the core of the wave. In the 0% offset case, instability occurs on both the upper and lower interfaces of the pycnocline and is similar in extent and vigour over the two interfaces. As the offset percentage is increased, however, instability is more pronounced on the lower interface with little or no evidence of instability being observed on the upper interface. In the 20% offset case a mode-1 tail is associated with the wave and the wave characteristics resemble qualitatively the recent field observations of Shroyer et al [E. L. Shroyer, J. N. Moum and J. D. Nash, J. Geophys. Res. 115, C07001 (2010)].
dc.relation.ispartofPhysics of Fluidsen
dc.rights© 2015 AIP Publishing LLC. Posted here by permission of the AIP. The definitive version was published in Physics of Fluids 27, 4 doi: 10.1063/1.4916881en
dc.subjectQC Physicsen
dc.subjectQA Mathematicsen
dc.titleExperiments on the structure and stability of mode-2 internal solitary-like waves propagating on an offset pycnoclineen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.Applied Mathematicsen
dc.contributor.institutionUniversity of St Andrews.Scottish Oceans Instituteen
dc.description.statusPeer revieweden

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