Skip to content

Research at St Andrews

The interaction of two co-rotating quasi-geostrophic vortices in the vicinity of a surface buoyancy filament

Research output: Contribution to journalArticle

DOI

Author(s)

School/Research organisations

Abstract

In this paper, we investigate the interaction between two like-signed quasi-geostrophic uniform potential vorticity internal vortices in the vicinity of a surface buoyancy anomaly filament in a three dimensional, stably stratified and rapidly rotating fluid. The surface buoyancy distribution locally modifies the pressure fields and generates a shear flow. We start the study by first considering the effects of a uniform linear horizontal shear on the binary vortex interaction. We confirm that a cooperative shear facilitates the merger of a pair of vortices while an adverse shear has the opposite effect. We next investigate the binary vortex interaction in thevicinity of the surface buoyancy filament explicitly. Here, not only the filament generates a shear flow, but it also responds dynamically to the forcing by the vortex pair. The filament destabilises and forms buoyancy billows at the surface. These billows interact with the internal vortices. In particular, a surface billow may pair with one of the internal vortices. In such cases, the like-signed internal vortex pair may separate if they are initially moderately distant from each other.
Close

Details

Original languageEnglish
Number of pages26
JournalGeophysical and Astrophysical Fluid Dynamics
VolumeLatest articles
Early online date4 Dec 2017
DOIs
StateE-pub ahead of print - 4 Dec 2017

    Research areas

  • Vortex dynamics, Vortex merger, Surface quasi-geostrophy, Quasi-geostrophy

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. The interaction of two surface vortices near a topographic slope in a stratified ocean

    de Marez, C., Carton, X., Morvan, M. & Reinaud, J. N. Dec 2017 In : Fluids. 2, 4, 25 p., 57

    Research output: Contribution to journalArticle

  2. Vortex merger near a topographic slope in a homogeneous rotating fluid

    Carton, X., Morvan, M., Reinaud, J. N., Sokolovskiy, M., L'Hégaret, P. & Vic, C. 1 Oct 2017 In : Regular and Chaotic Dynamics. 22, 5, p. 455-478

    Research output: Contribution to journalArticle

  3. Interaction between a quasi-geostrophic buoyancy filament and a heton

    Reinaud, J. N., Carton, X. & Dritschel, D. G. Sep 2017 In : Fluids. 2, 3, 20 p., 37

    Research output: Contribution to journalArticle

  4. Interaction between a surface quasi-geostrophic buoyancy anomaly jet and internal vortices

    Reinaud, J. N., Dritschel, D. G. & Carton, X. Aug 2017 In : Physics of Fluids. 29, 8, 16 p., 086603

    Research output: Contribution to journalArticle

  5. Geostrophic tripolar vortices in a two-layer fluid: linear stability and nonlinear evolution of equilibria

    Reinaud, J. N., Sokolovskiy, M. & Carton, X. Mar 2017 In : Physics of Fluids. 29, 3, 16 p., 036601

    Research output: Contribution to journalArticle

Related by journal

Related by journal

  1. Geophysical and Astrophysical Fluid Dynamics (Journal)

    Priest, E. R. (Member of editorial board)
    1998 → …

    Activity: Publication peer-review and editorial workEditor of research journal

  2. Geophysical and Astrophysical Fluid Dynamics (Journal)

    Hood, A. W. (Editor)
    1980 → …

    Activity: Publication peer-review and editorial workEditor of research journal

ID: 251521757