Publication Abstracts
Liu et al. 2008
, , and W.P. Arnott, 2008: A study of radiative properties of fractal soot aggregates using the superposition T-matrix method. J. Quant. Spectrosc. Radiat. Transfer, 109, 2656-2663, doi:10.1016/j.jqsrt.2008.05.001.
We employ the numerically exact superposition T-matrix method to perform extensive computations of scattering and absorption properties of soot aggregates with varying state of compactness and size. The fractal dimension, Df, is used to quantify the geometrical mass dispersion of the clusters. The optical properties of soot aggregates for a given fractal dimension are complex functions of the refractive index of the material m, the number of monomers NS, and the monomer radius a. It is shown that for smaller values of a, the absorption cross section tends to be relatively constant when Df < 2 but increases rapidly when Df > 2. However, a systematic reduction in light absorption with Df is observed for clusters with sufficiently large NS, m, and a. The scattering cross section and single-scattering albedo increase monotonically as fractals evolve from chain-like to more densely packed morphologies, which is a strong manifestation of the increasing importance of scattering interaction among spherules. Overall, the results for soot fractals differ profoundly from those calculated for the respective volume-equivalent soot spheres as well as for the respective external mixtures of soot monomers under the assumption that there are no electromagnetic interactions between the monomers. The climate-research implications of our results are discussed.
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BibTeX Citation
@article{li05400j,
author={Liu, L. and Mishchenko, M. I. and Arnott, W. P.},
title={A study of radiative properties of fractal soot aggregates using the superposition T-matrix method},
year={2008},
journal={J. Quant. Spectrosc. Radiat. Transfer},
volume={109},
pages={2656--2663},
doi={10.1016/j.jqsrt.2008.05.001},
}
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RIS Citation
TY - JOUR ID - li05400j AU - Liu, L. AU - Mishchenko, M. I. AU - Arnott, W. P. PY - 2008 TI - A study of radiative properties of fractal soot aggregates using the superposition T-matrix method JA - J. Quant. Spectrosc. Radiat. Transfer VL - 109 SP - 2656 EP - 2663 DO - 10.1016/j.jqsrt.2008.05.001 ER -
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