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| Titel |
Lagrangian velocity statistics of directed launch strategies in a Gulf of Mexico model |
| VerfasserIn |
M. Toner, 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 ; 11, no. 1 ; Nr. 11, no. 1 (2004-02-25), S.35-46 |
| Datensatznummer |
250009022
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| Publikation (Nr.) |
 copernicus.org/npg-11-35-2004.pdf |
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| Zusammenfassung |
| The spatial dependence of Lagrangian displacement and velocity
statistics is studied in the context
of a data assimilating numerical model of the Gulf Mexico. In the active
eddy region of the Western Gulf, a combination of Eulerian and Lagrangian
measures are used to locate strongly hyperbolic regions of the flow.
The statistics of the velocity field sampled by sets of drifters launched
specifically in these hyperbolic regions are compared to those
produced by randomly chosen launch sites. The results show that particle
trajectories initialized in hyperbolic regions
preferentially sample a broader range of Eulerian velocities
than do members of ensembles of randomly launched drifters. The
velocity density functions produced by the directed launches compare
well with Eulerian velocity pdfs. Implications for the development of
launch strategies to improve Eulerian velocity field reconstruction from
drifter data are discussed. |
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