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Applied Optics

Applied Optics


  • Vol. 39, Iss. 24 — Aug. 20, 2000
  • pp: 4205–4213

Light scattering and absorption by soot in the presence of sulfate aerosols

Melina P. Ioannidou, Ioanna I. Bakatsoula, and Dimitris P. Chrissoulidis  »View Author Affiliations

Applied Optics, Vol. 39, Issue 24, pp. 4205-4213 (2000)

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The radiative properties of aerosol–soot mixtures, both internal and external, are determined in the visible and near-infrared bands by use of exact indirect mode-matching solutions to electromagnetic-wave scattering from a sphere with an eccentric spherical inclusion and from a cluster of spheres. Spherical sulfate droplets are assumed to represent aerosol particles. Soot particles are represented by volume-equivalent carbon spheres, the size distribution of which is obtained from the number distribution of the primary carbon particles that aggregate into soot grains. The mean gram-specific absorption cross section and the mean albedo of aerosol–soot mixtures are obtained by integration of the corresponding characteristics of composite sulfate–carbon particles over the size range of carbon spheres. Enhanced absorption of light by soot in aerosol–soot mixtures, a result of lensing by sulfate droplets, is highlighted by maps of the electromagnetic field in a sulfate–carbon particle.

© 2000 Optical Society of America

OCIS Codes
(010.1110) Atmospheric and oceanic optics : Aerosols
(260.2110) Physical optics : Electromagnetic optics
(280.1120) Remote sensing and sensors : Air pollution monitoring
(280.1310) Remote sensing and sensors : Atmospheric scattering
(290.0290) Scattering : Scattering
(300.1030) Spectroscopy : Absorption

Original Manuscript: August 25, 1999
Revised Manuscript: March 30, 2000
Published: August 20, 2000

Melina P. Ioannidou, Ioanna I. Bakatsoula, and Dimitris P. Chrissoulidis, "Light scattering and absorption by soot in the presence of sulfate aerosols," Appl. Opt. 39, 4205-4213 (2000)

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