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Proceedings Paper

Peculiarities of condensation transformation of the atmospheric aerosol parameters at phase transition
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Paper Abstract

The dependence of the size and optical parameters of atmospheric aerosol on relative humidity usually is a smooth curve described by a single-parameter formula of a Kasten-Hanel type. But sometimes, more often in spring, the dramatic increase of the scattering coefficient in a narrow range of relative humidity is observed (as a rule, at 60-70%). It is caused by phase transition (deliquescence) of the aerosol matter. To study this process, we have carried out detailed measurements of the angular scattering characteristics, including polarization, in the visible wavelength range with humidity step of 1%. Then these data were inverted to the particle size spectrum and refractive index at each value of relative humidity. Comparative analysis of the peculiarities of transformation of the aerosol microstructure in the case of phase transition and without it is presented.

Paper Details

Date Published: 27 November 2012
PDF: 4 pages
Proc. SPIE 8696, Eighteenth International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 86960M (27 November 2012); doi: 10.1117/12.2012498
Show Author Affiliations
Svetlana A. Terpugova, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)

Published in SPIE Proceedings Vol. 8696:
Eighteenth International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics
Oleg A. Romanovskii, Editor(s)

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