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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 23, issue 4
Nonlin. Processes Geophys., 23, 159–173, 2016
https://doi.org/10.5194/npg-23-159-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Nonlin. Processes Geophys., 23, 159–173, 2016
https://doi.org/10.5194/npg-23-159-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 05 Jul 2016

Research article | 05 Jul 2016

Detecting and tracking eddies in oceanic flow fields: a Lagrangian descriptor based on the modulus of vorticity

Rahel Vortmeyer-Kley et al.

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Cited articles

Abraham, E. R.: The generation of plankton patchiness by turbulent stirring, Nature, 391, 577–580, 1998.
Artale, V., Boffetta, G., Celani, M., Cencini, M., and Vulpiani, A.: Dispersion of passive tracers in closed basins: Beyond the diffusion coeffcient, Phys. Fluids, 9, 3162–3171, 1997.
Bastine, D. and Feudel, U.: Inhomogeneous dominance patterns of competing phytoplankton groups in the wake of an island, Nonlin. Processes Geophys., 17, 715–731, https://doi.org/10.5194/npg-17-715-2010, 2010.
Bettencourt, J. H., López, C., and Hernández-García, E.: Oceanic three-dimensional Lagrangian coherent structures: A study of a mesoscale eddy in the Benguela upwelling region, Ocean Model., 51, 73–83, 2012.
Boffetta, G., Lacorata, G., Redaelli, G., and Vulpiani, A.: Detecting barriers to transport: a review of different techniques, Physica D, 159, 58–70, 2001.
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Since eddies play a major role in the dynamics of oceanic flows, it is of great interest to gain information about their tracks, lifetimes and shapes. We develop an eddy tracking tool based on structures in the flow with collecting (attracting) or separating (repelling) properties. In test cases mimicking oceanic flows it yields eddy lifetimes close to the analytical ones. It even provides a detailed view of the dynamics that can be useful to gain more insight into eddy dynamics in oceanic flows.
Since eddies play a major role in the dynamics of oceanic flows, it is of great interest to gain...
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