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dc.contributor.authorReinaud, Jean Noel
dc.contributor.authorCarton, Xavier
dc.contributor.authorDritschel, David Gerard
dc.date.accessioned2017-07-03T16:30:18Z
dc.date.available2017-07-03T16:30:18Z
dc.date.issued2017-09
dc.identifier.citationReinaud , J N , Carton , X & Dritschel , D G 2017 , ' Interaction between a quasi-geostrophic buoyancy filament and a heton ' , Fluids , vol. 2 , no. 3 , 37 . https://doi.org/10.3390/fluids2030037en
dc.identifier.issn2311-5521
dc.identifier.otherPURE: 250361082
dc.identifier.otherPURE UUID: 54ae4880-7e3c-4db3-8b35-8c2c7d3bd0b6
dc.identifier.otherORCID: /0000-0001-5449-6628/work/34852195
dc.identifier.otherScopus: 85028371676
dc.identifier.otherWOS: 000417150200003
dc.identifier.otherORCID: /0000-0001-6489-3395/work/64697824
dc.identifier.urihttps://hdl.handle.net/10023/11138
dc.description.abstractWe investigate the interaction between a heton and a current generated by a filament of buoyancy anomaly at the surface. Hetons are baroclinic dipoles consisting of a pair of vortices of opposite sign lying at different depths. Such structures have a self-induced motion whenever the pair of vortices are offset horizontally. A surface buoyancy filament generates a shear flow since the density perturbation modifies locally the pressure field. The vertical shear induced by the filament offsets the vortices of the heton if vertically aligned initially. Moreover, if the vortex nearer the surface is in adverse horizontal shear with the buoyancy filament the heton tends to move towards the filament. Conversely, if the upper vortex is in cooperative horizontal shear with the buoyancy filament, the heton moves away from it. The filament is also naturally unstable and eventually breaks into a series of billows as it is perturbed by the heton. Moderate to large intensity surface buoyancy distributions separate the vortices of the heton, limiting its advection as a baroclinic dipole. Instead, the vortices of the heton start to interact strongly with surface billows. Additionally, the vortices of the heton can be partially destroyed by the filament if the shear it induces is sufficiently large.
dc.format.extent20
dc.language.isoeng
dc.relation.ispartofFluidsen
dc.rightsCopyright 2017 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).en
dc.subjectVortex dynamicsen
dc.subjectSurface bouyancy anomalyen
dc.subjectQuasi-geostrophyen
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.subjectNDASen
dc.subject.lccQCen
dc.subject.lccTKen
dc.titleInteraction between a quasi-geostrophic buoyancy filament and a hetonen
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.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.identifier.doihttps://doi.org/10.3390/fluids2030037
dc.description.statusPeer revieweden


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