Models for integrated and differential scattering optical properties of encapsulated light absorbing carbon aggregates
Journal article, 2013

Optical properties of light absorbing carbon (LAC) aggregates encapsulated in a shell of sulfate are computed for realistic model geometries based on field measurements. Computations are performed for wavelengths from the UV-C to the mid-IR. Both climate- and remote sensing-relevant optical properties are considered. The results are compared to commonly used simplified model geometries, none of which gives a realistic representation of the distribution of the LAC mass within the host material and, as a consequence, fail to predict the optical properties accurately. A new core-gray shell model is introduced, which accurately reproduces the size- and wavelength dependence of the integrated and differential optical properties.

p577

t-matrix

morphology

wavelength

absorption

black carbon

electromagnetic scattering

v430

aerosol-particles

ang h

1990

proceedings of the royal society-mathematical and physical sciences

discrete-dipole approximation

in-situ

soot

Author

Michael Kahnert

Chalmers, Earth and Space Sciences, Global Environmental Measurements and Modelling

T. Nousiainen

University of Helsinki

H. Lindqvist

University of Helsinki

Optics Express

1094-4087 (ISSN)

Vol. 21 7 7974-7993

Aerosol Optics in Global Earth System Modelling (AGES)

Swedish Research Council (VR), 2011-10-26 -- 2014-10-26.

Subject Categories

Physical Sciences

DOI

10.1364/OE.21.007974

More information

Latest update

5/23/2018