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Proceedings Paper

Determination of concentration and size distribution of black carbon in submicron aerosol from data of nephelometric measurements of angular scattering coefficients
Author(s): Valerii S. Kozlov; Rustam F. Rakhimov; Vladimir P. Shmargunov
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Paper Abstract

The possibility of determining the Black Carbon (BC) concentration and its size distribution in submicron aerosol from data of polarization spectronephelometric measurements of angular aerosol scattering is demonstrated for the first time. The data of simultaneous nephelometric and aethalometric measurements of BC concentration in wood smoke are compared. The inverse problem is solved from measurements of 40 polarization components of spectral coefficients of angular scattering, and aerosol filling factors and the imaginary part of the complex refractive indexes are determined for subfractions of ultrafine- (radii of 30-100 nm), fine- (100-430 nm), and coarse-disperse (430-770 nm) particles. Then the total BC concentration, its size distribution, and BC fraction are estimated in the approximation of homogeneous volume internal mixture of BC and nonabsorbing matter. The analysis shows that at the long evolution of smoke aerosol, nephelometric and aethalometric estimates of the BC concentrations are in a good agreement. The discrepancy averages about 16% for concentrations varying in a range 30-1000 μg/m3.

Paper Details

Date Published: 19 November 2015
PDF: 5 pages
Proc. SPIE 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics, 96802Z (19 November 2015); doi: 10.1117/12.2204926
Show Author Affiliations
Valerii S. Kozlov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
Rustam F. Rakhimov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
Vladimir P. Shmargunov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)


Published in SPIE Proceedings Vol. 9680:
21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics
Oleg A. Romanovskii, Editor(s)

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