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| Titel |
The effect of stochastic perturbations on plankton transport by internal solitary waves |
| VerfasserIn |
M. Stastna, F. J. Poulin, C. Subich, J. V. Mecking |
| 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 ; 18, no. 6 ; Nr. 18, no. 6 (2011-12-21), S.1001-1012 |
| Datensatznummer |
250014012
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| Publikation (Nr.) |
 copernicus.org/npg-18-1001-2011.pdf |
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| Zusammenfassung |
| Internal solitary and solitary-like waves are a commonly observed feature of
density stratified natural waters, including lakes and the coastal ocean.
Since such waves induce significant currents throughout the water column they
can be responsible for significant transport of both passive and swimming
biota. We consider simple models of moving zooplankton based on the Langevin
equation. The small amplitude randomness significantly alters the nature of
particle motion. In particular, passage through the wave leads to strongly
non Gaussian particle distributions. When the plankton swims to return to its
equilibrium photic level, a steady state that balances randomness, swimming
and wave-induced motions is possible. We discuss possible implications of
this steady state for organisms that feed on plankton. |
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