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| Titel |
Eddy growth and mixing in mesoscale oceanographic flows |
| VerfasserIn |
G. Haller, A. C. Poje |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 4, no. 4 ; Nr. 4, no. 4, S.223-235 |
| Datensatznummer |
250001811
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| Publikation (Nr.) |
 copernicus.org/npg-4-223-1997.pdf |
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| Zusammenfassung |
| We study the relation between changes in the Eulerian
topology of a two dimensional flow and the mixing of fluid particles between qualitatively
different regions of the flow. In general time dependent flows, streamlines and particle
paths are unrelated. However, for many mesoscale oceanographic features such as detaching
rings and meandering jets, the rate at which the Euierian structures evolve is
considerably slower than typical advection speeds of Lagrangian tracers. In this note we
show that for two-dimensional, adiabatic fluid flows there is a direct relationship
between observable changes in the topology of the Eulerian field and the rate of transport
of fluid particles. We show that a certain class of flows is amenable to adiabatic or near
adiabatic analysis, and, as an example, we use our results to study the chaotic mixing in
the Dutkiewicz and Paldor (1994) kinematic model of the interaction of a meandering
barotropic jet with a strong eddy. |
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