Title

Performance of a Dual-Range Cloud Nucleus Counter

Abstract

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.

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1978 American Meteorological Society, All rights reserved.


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