Articles | Volume 24, issue 3
Research article
25 Jul 2017
Research article |  | 25 Jul 2017

Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex

Jezabel Curbelo, Víctor José García-Garrido, Carlos Roberto Mechoso, Ana Maria Mancho, Stephen Wiggins, and Coumba Niang

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Revised manuscript accepted for NPG
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Cited articles

Aref, H.: Stirring by chaotic advection, J. Fluid Mech., 143, 1–21, 1984.
Bettencourt, J. H., López, C., Hernández-García, E., Montes, I., Sudre, J., Dewitte, B., Paulmier, A., and Garçon, V.: Boundaries of the Peruvian oxygen minimum zone shaped by coherent mesoscale dynamics, Nat. Geosci., 8, 937–940, 2014.
Bowman, K. P.: Large-scale isentropic mixing properties of the Antarctic polar vortex from analyzed winds, J. Geophys. Res., 98, 23013–23027,, 1993.
Branicki, M. and Kirwan Jr., A. D.: Stirring: The Eckart paradigm revisited, Int. J. Eng. Sci., 48, 1027–1042, 2010.
Branicki, M. and Wiggins, S.: An adaptive method for computing invariant manifolds in non-autonomous, three-dimensional dynamical systems, Physica D, 238, 1625–1657, 2009.
Short summary
Lagrangian coherent structures have supported the description of transport processes in fluid dynamics. In this work we use the M function to provide new insights into the 3-D Lagrangian structure of the southern stratosphere. Dynamical systems concepts appropriate to 3-D, such as normally hyperbolic invariant curves, are discussed and applied to describe the vertical extension of the stratospheric polar vortex and its evolution.