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Stability of filaments of uniform quasi-geostrophic potential vorticity

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Stability of filaments of uniform quasi-geostrophic potential vorticity. / Reinaud, Jean N.

In: Geophysical and Astrophysical Fluid Dynamics, Vol. Latest Articles, 27.01.2020.

Research output: Contribution to journalArticle

Harvard

Reinaud, JN 2020, 'Stability of filaments of uniform quasi-geostrophic potential vorticity', Geophysical and Astrophysical Fluid Dynamics, vol. Latest Articles. https://doi.org/10.1080/03091929.2019.1704752

APA

Reinaud, J. N. (2020). Stability of filaments of uniform quasi-geostrophic potential vorticity. Geophysical and Astrophysical Fluid Dynamics, Latest Articles. https://doi.org/10.1080/03091929.2019.1704752

Vancouver

Reinaud JN. Stability of filaments of uniform quasi-geostrophic potential vorticity. Geophysical and Astrophysical Fluid Dynamics. 2020 Jan 27;Latest Articles. https://doi.org/10.1080/03091929.2019.1704752

Author

Reinaud, Jean N. / Stability of filaments of uniform quasi-geostrophic potential vorticity. In: Geophysical and Astrophysical Fluid Dynamics. 2020 ; Vol. Latest Articles.

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@article{bfcc740694584226a8073e1a0c1bcaef,
title = "Stability of filaments of uniform quasi-geostrophic potential vorticity",
abstract = "We analyse the linear stability of filaments of uniform potential vorticity with a horizontal axis in a quasi- geostrophic flow. For a single filament, the situation corresponds to the simplest three-dimensional shear zone in a rapidly rotating, continuously stably stratified fluid. Yet, this has not been formally addressed to our knowledge. We show that the filament is sensitive to the Kelvin-Helmholtz instability for perturbations in a finite range of streamwise wavenumbers 0 < k < kc, similarly to the classical situation of a two- dimensional strip of uniform vorticity. We also analyse the stability of a jet formed by two parallel filaments of opposite PV whose axes are located on the same horizontal plane as well as the stability of {"}hetonic{"} filaments. Hetonic filaments consist of a pair of opposite PV filaments located at different heights. These can be sensitive to baroclinic instabilities over a wide range of longitudinal wavenumbers.",
keywords = "Vortex dynamics, Quasi-geostrophy",
author = "Reinaud, {Jean N.}",
year = "2020",
month = jan,
day = "27",
doi = "10.1080/03091929.2019.1704752",
language = "English",
volume = "Latest Articles",
journal = "Geophysical and Astrophysical Fluid Dynamics",
issn = "0309-1929",
publisher = "Taylor and Francis",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Stability of filaments of uniform quasi-geostrophic potential vorticity

AU - Reinaud, Jean N.

PY - 2020/1/27

Y1 - 2020/1/27

N2 - We analyse the linear stability of filaments of uniform potential vorticity with a horizontal axis in a quasi- geostrophic flow. For a single filament, the situation corresponds to the simplest three-dimensional shear zone in a rapidly rotating, continuously stably stratified fluid. Yet, this has not been formally addressed to our knowledge. We show that the filament is sensitive to the Kelvin-Helmholtz instability for perturbations in a finite range of streamwise wavenumbers 0 < k < kc, similarly to the classical situation of a two- dimensional strip of uniform vorticity. We also analyse the stability of a jet formed by two parallel filaments of opposite PV whose axes are located on the same horizontal plane as well as the stability of "hetonic" filaments. Hetonic filaments consist of a pair of opposite PV filaments located at different heights. These can be sensitive to baroclinic instabilities over a wide range of longitudinal wavenumbers.

AB - We analyse the linear stability of filaments of uniform potential vorticity with a horizontal axis in a quasi- geostrophic flow. For a single filament, the situation corresponds to the simplest three-dimensional shear zone in a rapidly rotating, continuously stably stratified fluid. Yet, this has not been formally addressed to our knowledge. We show that the filament is sensitive to the Kelvin-Helmholtz instability for perturbations in a finite range of streamwise wavenumbers 0 < k < kc, similarly to the classical situation of a two- dimensional strip of uniform vorticity. We also analyse the stability of a jet formed by two parallel filaments of opposite PV whose axes are located on the same horizontal plane as well as the stability of "hetonic" filaments. Hetonic filaments consist of a pair of opposite PV filaments located at different heights. These can be sensitive to baroclinic instabilities over a wide range of longitudinal wavenumbers.

KW - Vortex dynamics

KW - Quasi-geostrophy

U2 - 10.1080/03091929.2019.1704752

DO - 10.1080/03091929.2019.1704752

M3 - Article

VL - Latest Articles

JO - Geophysical and Astrophysical Fluid Dynamics

JF - Geophysical and Astrophysical Fluid Dynamics

SN - 0309-1929

ER -

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