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| Titel |
Drifter dispersion in the Adriatic Sea: Lagrangian data and chaotic model |
| VerfasserIn |
G. Lacorata, E. Aurell, A. Vulpiani |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 19, no. 1 ; Nr. 19, no. 1, S.121-129 |
| Datensatznummer |
250014182
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| Publikation (Nr.) |
 copernicus.org/angeo-19-121-2001.pdf |
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| Zusammenfassung |
We analyze characteristics
of drifter trajectories from the Adriatic Sea with recently introduced nonlinear
dynamics techniques. We discuss how in quasi-enclosed basins, relative
dispersion as a function of time, a standard analysis tool in this context, may
give a distorted picture of the dynamics. We further show that useful
information may be obtained by using two related non-asymptotic indicators, the
Finite-Scale Lyapunov Exponent (FSLE) and the Lagrangian Structure Function (LSF),
which both describe intrinsic physical properties at a given scale. We introduce
a simple chaotic model for drifter motion in this system, and show by comparison with the model that Lagrangian dispersion is mainly driven by
advection at sub-basin scales until saturation sets in.
Key words. Oceanography: General (marginal and
semi-closed seas) – Oceanography: Physical (turbulence, diffusion, and mixing
processes; upper ocean processes) |
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