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dc.contributor.authorCarton, Xavier
dc.contributor.authorMorvan, Mathieu
dc.contributor.authorReinaud, Jean Noel
dc.contributor.authorSokolovskiy, Mikhail
dc.contributor.authorL'Hégaret, Pierre
dc.contributor.authorVic, Clément
dc.identifier.citationCarton , X , Morvan , M , Reinaud , J N , Sokolovskiy , M , L'Hégaret , P & Vic , C 2017 , ' Vortex merger near a topographic slope in a homogeneous rotating fluid ' , Regular and Chaotic Dynamics , vol. 22 , no. 5 , pp. 455-478 .
dc.identifier.otherPURE: 251040791
dc.identifier.otherPURE UUID: 8f61959c-54f7-4a79-863a-ef50128fb458
dc.identifier.otherScopus: 85030178953
dc.identifier.otherORCID: /0000-0001-5449-6628/work/37255567
dc.identifier.otherWOS: 000412030900001
dc.descriptionThis work is a contribution to the PHYSINDIEN research program. It was supported by CNRS-RFBR contract PRC 1069/16-55-150001.en
dc.description.abstractThe effect of a bottom slope on the merger of two identical Rankine vortices is investigated in a two dimensional, quasi-geostrophic, incompressible fluid. When two cyclones initially lie parallel to the slope, and more than two vortex diameters away from the slope, the critical merger distance is unchanged. When the cyclones are closer to the slope, they can merge at larger distances, but they lose more mass into filaments, thus weakening the efficiency of merger. Several effects account for this: the topographic Rossby wave advects the cyclones, reduces their mutual distance and deforms them. This along shelf wave breaks into filaments and into secondary vortices which shear out the initial cyclones. The global motion of fluid towards the shallow domain and the erosion of the two cyclones are confirmed by the evolution of particles seeded both in the cyclone sand near the topographic slope. The addition of tracer to the flow indicates that diffusion is ballistic at early times. For two anticyclones, merger is also facilitated because one vortex is ejected offshore towards the other, via coupling with a topographic cyclone. Again two anticyclones can merge at large distance but they are eroded in the process. Finally, for taller topographies, the critical merger distance is again increased and the topographic influence can scatter or completely erode one of the two initial cyclones. Conclusions are drawn on possible improvements of the model configuration for an application to the ocean.
dc.relation.ispartofRegular and Chaotic Dynamicsen
dc.rights© 2017, Pleiades Publishing Ltd. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectTwo-dimensional incompressible flowen
dc.subjectVortex mergeren
dc.subjectCritical merger distanceen
dc.subjectBottom slopeen
dc.subjectTopographic wave and vorticesen
dc.subjectQA Mathematicsen
dc.subjectQC Physicsen
dc.titleVortex merger near a topographic slope in a homogeneous rotating fluiden
dc.typeJournal articleen
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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