Performance of a Dual-Range Cloud Nucleus Counter
An insturment for measuring the concentrations of cloud condensation nuclei as a function of nucleus critical supersaturation (S//c) is described. In the range 0. 1% less than equivalent to S//c less than equivalent to 0. 1%, the instrument is operated as a vertical flow thermal diffusion chamber. In the range of 0. 016% less than equivalent to S//c less than equivalent to 0. 1%, the chamber is operated at 100% humidity, and the equilibrium radii of the nuclei are measured with an optical counter. This paper presents a large body of data taken in the laboratory to evaluate the performance of the instrument. The data indicates that the instrument is internally consistent over a wide range of operating conditions.
D. J. Alofs, "Performance of a Dual-Range Cloud Nucleus Counter," Journal of Applied Meteorology, American Meteorological Society, Jan 1978.
The definitive version is available at http://dx.doi.org/10.1175/1520-0450(1978)017<1286:POADRC>2.0.CO;2
Mechanical and Aerospace Engineering
Article - Journal
© 1978 American Meteorological Society, All rights reserved.