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Inherent and apparent scattering properties of coated or uncoated spheres embedded in an absorbing host medium

Ping Yang, Bo-Cai Gao, Warren J. Wiscombe, Michael I. Mishchenko, Steven E. Platnick, Hung-Lung Huang, Bryan A. Baum, Yong X. Hu, Dave M. Winker, Si-Chee Tsay, and Seon K. Park

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Abstract

The conventional Lorenz-Mie formalism is extended to the case for a coated sphere embedded in an absorbing medium. The apparent and inherent scattering cross sections of a particle, derived from the far field and near field, respectively, are different if the host medium is absorptive. The effect of absorption within the host medium on the phase-matrix elements associated with polarization depends on the dielectric properties of the scattering particle. For the specific cases of a soot particle coated with a water layer and an ice sphere containing an air bubble, the phase-matrix elements -P 12/P 11 and P 33/P 11 are unique if the shell is thin. The radiative transfer equation for a multidisperse particle system embedded within an absorbing medium is discussed. Conventional multiple-scattering computational algorithms can be applied if scaled apparent single-scattering properties are applied.

© 2002 Optical Society of America

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