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dc.contributor.authorReinaud, Jean Noel
dc.contributor.authorCarton, Xavier
dc.identifier.citationReinaud , J N & Carton , X 2021 , ' The merger of two three-dimensional quasi-geostrophic baroclinic tripolar eddies ' , Geophysical and Astrophysical Fluid Dynamics , vol. 115 , no. 5-6 , pp. 523-550 .
dc.identifier.otherPURE: 272488775
dc.identifier.otherPURE UUID: 62d8898c-925a-41f2-b7cb-948ce9bf4723
dc.identifier.otherORCID: /0000-0001-5449-6628/work/90567346
dc.identifier.otherScopus: 85101781719
dc.identifier.otherWOS: 000622310600001
dc.description.abstractWe investigate the strong interaction between two baroclinic tripolar eddies in a three-dimensional, rapidly- rotating, continuously stratified flow under the quasi-geostrophic approximation. Each tripolar eddy consists of an anticyclonic central vortex with two oblate cyclonic vortices located above and below the anticyclone. The interaction depends on the vertical and horizontal offsets between the two tripolar eddies. For small and low PV oblate cyclones, each tripolar eddy alone is only weakly unstable to a baroclinic mode. The instability puts the three vortices out of alignment. Most of the eddy however survives the instability. When two tripolar eddies interact, their constituent vortices may merge. Merger occurs when the eddies are close enough together, and shows similarities with the merger of monopolar vortices. Vertically separated eddies do not align vertically. This suggests the importance of an external flow for the alignment, observed in the oceans, to occur. We finally show that the interaction between two tripolar eddies with intense oblate cyclones is very different and show similarities with the dynamics of dipolar baroclinic eddies known as hetons.
dc.relation.ispartofGeophysical and Astrophysical Fluid Dynamicsen
dc.rightsCopyright © 2021 Informa UK Limited, trading as Taylor & Francis Group. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectVortex interactionsen
dc.subjectVortex mergeren
dc.subjectQA Mathematicsen
dc.subjectQC Physicsen
dc.subjectQE Geologyen
dc.titleThe merger of two three-dimensional quasi-geostrophic baroclinic tripolar eddiesen
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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