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| Titel |
Objective Eulerian Coherent Structures Predict Drifter Motion |
| VerfasserIn |
Mattia Serra, George Haller |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250141234
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| Publikation (Nr.) |
 EGU/EGU2017-4717.pdf |
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| Zusammenfassung |
| Recent results show that Objective Eulerian Coherent Structures (OECSs) (Serra, M. and Haller, G., Chaos 26(5), 2016) reveal the correct, frame-independent locations of instantaneous saddle-type material behavior in unsteady flows. Using an unsteady ocean surface velocity field reconstructed from high-frequency-radar measurements, we compute attracting OECSs in a region of the North-East coast of the US, where drifter trajectories are also available. Remarkably, we find that despite their non-passive and inertial dynamics, drifters align rapidly with nearby attracting OECSs. At the same time, the drifter attractors remain completely hidden in instantaneous streamlines plots and in the Okubo-Weiss field. |
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