Measured Spectra of the Hygroscopic Fraction of Atmospheric Aerosol Particles

Author

Darryl J. Alofs, Missouri University of Science and TechnologyFollow
Donald E. Hagen, Missouri University of Science and TechnologyFollow
Max B. Trueblood, Missouri University of Science and TechnologyFollow

Abstract

The relation between dry diameter (X₀) and critical supersaturation (S_c) for atmospheric submicron aerosol particles is investigated using a long term air sampling program at Rolla, Missouri. The particles are passed through an electrostatic aerosol size classifier, and then through an isothermal haze chamber. Results are reported in terms of an apparent volume fraction of soluble material, ε_v defined such that for particles composed only of ammonium sulfate and water insoluble compounds, ε_v is the actual volume fraction of soluble material. The probability distribution of ε_v is found to be approximately Gaussian in the ε_v range 0.2 to 1.3. The mean ε_v is 0.5, for electrostatic aerosol classifier settings of 0.2, 0.3, and 0.4 μm diameter.

Recommended Citation

D. J. Alofs et al., "Measured Spectra of the Hygroscopic Fraction of Atmospheric Aerosol Particles," Journal of Applied Meteorology, vol. 28, no. 2, pp. 126 - 136, American Meteorological Society, Feb 1989.

The definitive version is available at https://doi.org/10.1175/1520-0450(1989)028<0126:MSOTHF>2.0.CO;2

Department(s)

Mechanical and Aerospace Engineering

Second Department

Physics

Third Department

Chemistry

Keywords and Phrases

Aerosol Particle; Hygroscopic Fraction; Spectra

International Standard Serial Number (ISSN)

0894-8763

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1989 American Meteorological Society, All rights reserved.

Publication Date

01 Feb 1989