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Influence of il dispersed in seawater on the bi-directional reflectance distribution function (BRDF)

Otremba Z.

Optica Applicata

2005

Vol. 35, nr 1

99-109

The bidirectional reflectance distribution function (BRDF) of the sea areas polluted by oil-in-water emulsion has been studied at the ends in the visible lihgt spectrum. The Monte Carlo code was applied to model water leaving radiance for the entire upper hemispere. Solar irradiance was represented by 1 billion virtual photos which reach the sea surface ar an angle of 40 deg. The results are displayed as the BRDF vs. two variables: zenith and azimuth angles. The strong impact of wavelenght on the BRDF has been revealed while, the size distribution of oil droplets has an insignificant imact. The presence of oil emulsion modifies the shape of the BRDF significantly, and the latter depends on the oil type. Irradiance reflectances and radiance reflectances derived from BRDFs obtained are also presented.