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| Titel |
Modeling of wave-induced irradiance variability in the upper ocean mixed layer |
| VerfasserIn |
M. Hieronymi, A. Macke, O. Zielinski |
| 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 ; 8, no. 2 ; Nr. 8, no. 2 (2012-03-01), S.103-120 |
| Datensatznummer |
250005503
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| Publikation (Nr.) |
 copernicus.org/os-8-103-2012.pdf |
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| Zusammenfassung |
| A Monte Carlo based radiative transfer model has been developed for
calculating the availability of solar radiation within the top 100 m of the
ocean. The model is optimized for simulations of spatial high resolution
downwelling irradiance Ed fluctuations that arise from the lensing
effect of waves at the water surface. In a first step the accuracy of
simulation results has been verified by measurements of the oceanic
underwater light field and through intercomparison with an established
radiative transfer model. Secondly the potential depth-impact of nonlinear
shaped single waves, from capillary to swell waves, is assessed by
considering the most favorable conditions for light focusing, i.e.
monochromatic light at 490 nm, very clear oceanic water with a low
chlorophyll a content of 0.1 mg m−3 and high sun elevation. Finally
light fields below irregular wave profiles accounting for realistic sea
states were simulated. Our simulation results suggest that under open ocean
conditions light flashes with 50% irradiance enhancements can appear
down to 35 m depth, and light variability in the range of ±10%
compared to the mean Ed is still possible in 100 m depth. |
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