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Interaction between a quasi-geostrophic buoyancy filament and a heton
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dc.contributor.author | Reinaud, Jean Noel | |
dc.contributor.author | Carton, Xavier | |
dc.contributor.author | Dritschel, David Gerard | |
dc.date.accessioned | 2017-07-03T16:30:18Z | |
dc.date.available | 2017-07-03T16:30:18Z | |
dc.date.issued | 2017-09 | |
dc.identifier.citation | Reinaud , 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/fluids2030037 | en |
dc.identifier.issn | 2311-5521 | |
dc.identifier.other | PURE: 250361082 | |
dc.identifier.other | PURE UUID: 54ae4880-7e3c-4db3-8b35-8c2c7d3bd0b6 | |
dc.identifier.other | ORCID: /0000-0001-5449-6628/work/34852195 | |
dc.identifier.other | Scopus: 85028371676 | |
dc.identifier.other | WOS: 000417150200003 | |
dc.identifier.other | ORCID: /0000-0001-6489-3395/work/64697824 | |
dc.identifier.uri | https://hdl.handle.net/10023/11138 | |
dc.description.abstract | We 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.extent | 20 | |
dc.language.iso | eng | |
dc.relation.ispartof | Fluids | en |
dc.rights | Copyright 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.subject | Vortex dynamics | en |
dc.subject | Surface bouyancy anomaly | en |
dc.subject | Quasi-geostrophy | en |
dc.subject | QC Physics | en |
dc.subject | TK Electrical engineering. Electronics Nuclear engineering | en |
dc.subject | NDAS | en |
dc.subject.lcc | QC | en |
dc.subject.lcc | TK | en |
dc.title | Interaction between a quasi-geostrophic buoyancy filament and a heton | en |
dc.type | Journal article | en |
dc.description.version | Publisher PDF | en |
dc.contributor.institution | University of St Andrews. Applied Mathematics | en |
dc.contributor.institution | University of St Andrews. Scottish Oceans Institute | en |
dc.contributor.institution | University of St Andrews. Marine Alliance for Science & Technology Scotland | en |
dc.identifier.doi | https://doi.org/10.3390/fluids2030037 | |
dc.description.status | Peer reviewed | en |
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