The relation between dry diameter (X0) and critical supersaturation (Sc) 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, εv defined such that for particles composed only of ammonium sulfate and water insoluble compounds, εv is the actual volume fraction of soluble material. The probability distribution of εv is found to be approximately Gaussian in the εv range 0.2 to 1.3. The mean εv is 0.5, for electrostatic aerosol classifier settings of 0.2, 0.3, and 0.4 μm diameter.
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
Mechanical and Aerospace Engineering
Keywords and Phrases
Aerosol Particle; Hygroscopic Fraction; Spectra
International Standard Serial Number (ISSN)
Article - Journal
© 1989 American Meteorological Society, All rights reserved.