Lobe dynamics applied to barotropic Rossby-wave breaking.

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Lobe dynamics applied to barotropic Rossby-wave breaking.

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dc.contributor.author Koh, Tieh Yong.
dc.contributor.author Plumb, R. Alan.
dc.date.accessioned 2012-06-20T08:40:53Z
dc.date.available 2012-06-20T08:40:53Z
dc.date.copyright 2000
dc.date.issued 2012-06-20
dc.identifier.citation Koh, T. Y. & Plumb, R. A. (2000). Lobe dynamics applied to barotropic Rossby-wave breaking. Physics of Fluids, 12(6), 1518-1528.
dc.identifier.issn 1070-6631
dc.identifier.uri http://hdl.handle.net/10220/8223
dc.description.abstract We applied the methods of lobe dynamics to the problem of transport across the edge of a barotropic vortex patch. The model used captures the essential dynamics of filament shedding in the wintertime stratospheric polar vortex. Two approaches were adopted for the problem: (1) the dominant periodic component of the vortical flow was identified and conventional lobe dynamics methods for periodic dynamical systems were applied to it; (2) the full aperiodic, dynamically consistent flow was retained and a modified brand of lobe dynamics was used to quantify the transport. Our results show that in the periodic case, much reversible transport occurs across the lobe dynamical boundary due to overlapping intruding and extruding lobes. In the aperiodic case, a small amount of intrusion was noted, contrary to the well-established fact that potential vorticity shedding in barotropic vortices is uniquely outwards. In our discussion, we argue that while lobe dynamics provides a rigorous framework for quantifying transport across the lobe dynamical boundary, this boundary may not be appropriate for quantifying transport across internal transport barriers, such as the stratospheric polar vortex edge.
dc.format.extent 12 p.
dc.language.iso en
dc.relation.ispartofseries Physics of fluids
dc.rights © 2000 American Institute of Physics.This paper was published in Physics of Fluids and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official URL: [http://dx.doi.org/10.1063/1.870400]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
dc.subject DRNTU::Science::Geology
dc.title Lobe dynamics applied to barotropic Rossby-wave breaking.
dc.type Journal Article
dc.identifier.doi http://dx.doi.org/10.1063/1.870400
dc.description.version Published version

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