Abstract
We study the impacts of the bio-optical model variations on the angular distribution ( factor) of the upwelling radiance field in ocean waters. An ocean water bio-optical model has been combined with a vector radiative transfer model to calculate the factors systematically. The factors are compared to those in [Appl. Opt. 41, 6289 (2002) [CrossRef] ] and the differences are found to be within for 81% of the total number of cases covering all wavelengths, chlorophyll a concentrations, and solar and viewing geometries. The differences are attributed to the choice of ocean water scattering function and scattering coefficient biases. In addition, we study the uncertainty of factor due to three factors: (I) the absorption coefficient of the colored dissolved organic matter (CDOM), (II) the particle scattering coefficient, and (III) the ocean water depolarization. The impacts of ocean water depolarization on the variation is found to be negligible. If we perturb the CDOM absorption coefficient by a factor ranging from 0.1 to 10, the values vary within of the average behavior of ocean waters for 93% of the cases. If we perturb the scattering coefficients by a factor ranging from 0.5 to 2.0, the variation is within for 81% of the cases studied. This work contributes to understanding the uncertainty of ocean color remote sensing.
© 2015 Optical Society of America
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