Abstract

Although transport of the visible component of solar radiation in a water body strongly influences thermal structure and the growth of photosynthetic organisms, little is known about the inherent radiative properties which govern this transport. These properties include the extinction, scattering, and absorption cross sections, as well as the scattering phase function. In this study, systematic property measurements have been made for two special cases: the wastewater suspension and the symbiotic algal culture. In both cases, extinction is dominated by scattering processes (rather than by absorption), but cross sections associated with the symbiotic cultures are typically a factor of 6 larger than those associated with the wastewater. In both cases the scattering phase function is strongly peaked in the forward direction.

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