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| Titel |
Wave-induced mixing and transport of buoyant particles: application to the Statfjord A oil spill |
| VerfasserIn |
M. Drivdal, G. Broström, K. H. Christensen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 10, no. 6 ; Nr. 10, no. 6 (2014-12-10), S.977-991 |
| Datensatznummer |
250117096
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| Publikation (Nr.) |
 copernicus.org/os-10-977-2014.pdf |
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| Zusammenfassung |
| This study focuses on how wave–current and wave–turbulence interactions modify the
transport of buoyant particles in
the ocean. Here the particles can represent
oil droplets, plastic particles, or plankton such as fish eggs
and larvae. Using the General Ocean Turbulence Model (GOTM),
modified to take surface wave effects
into account, we investigate how the increased mixing by wave
breaking and Stokes shear production, as well as the stronger veering
by the Coriolis–Stokes force, affects the drift of the
particles. The energy
and momentum fluxes, as well as the Stokes drift, depend on the
directional wave spectrum obtained from a wave model.
As a first test, the depth and velocity scales
from the model are compared with analytical solutions based on a
constant eddy viscosity (i.e., classical Ekman theory).
Secondly, the model is applied to a
case in which we investigate the oil drift after an oil spill
off the west coast of Norway in 2007.
During this accident the
average net drift of oil was observed to be both
slower and more deflected away from the wind direction than predicted
by oil-drift models. In this case, using wind and wave forcing
from the ERA Interim archive it is shown that the wave effects are
important for the resultant drift and have the potential
to improve drift forecasting. |
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