J. N. Reinaud, M.A. Sokolovskiy, X. Carton. Hetonic quartets in a two-layer quasi-geostrophic flow: V-states and stability. Physics of Fluids, 2018, v. 30, N 5, 056602 (8 pp).
We investigate families of finite core vortex quartets in mutual equilibrium in a two-layer quasi-geostrophic f l ow. The finite core solutions stem from known solutions for discrete (singular) vortex quartets. Two vortices lie in the top layer and two vortices lie in the bottom layer. Two vortices have a positive potential vorticity anomaly, while the two others have negative potential vorticity anomaly. The vortex configurations are therefore related to the baroclinic dipoles known in the literature as hetons. Two main branches of solutions exist depending on the arrangement of the vortices: the translating zigzag-shaped hetonic quartets and the rotating zigzag-shaped hetonic quartets. By addressing their linear stability, we show that while the rotating quartets can be unstable over a large range of the parameter space, most translating quartets are stable. This has implications on the longevity of such vortex equilibria in the oceans.
2019M. Morvan, P. L’Hégare, X. Carton, J. Gula, C. Vic, M. Sokolovskiy, K. Koshel. The life cycle of submesoscale eddies generated by topographic interactions. Ocean Science, 2019, v.15, N 6, pp. 1531-1543
2019Grigoryeva I. L., Komissarov A. B., Kuzovlev V. V., Lapina E.E., Chekmareva E. A. Features of the Winter Hydrochemical Regime of the Upper Volga Reservoirs // IOP Conference Series: Earth and Environmental Science. IOP Publishing Ltd. 2019