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Fog‐droplet sampling using a modified impactor technique
Author(s) -
May K. R.
Publication year - 1961
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49708737408
Subject(s) - fog , cascade impactor , range (aeronautics) , wind tunnel , meteorology , sampling (signal processing) , drop (telecommunication) , environmental science , cascade , mechanics , materials science , physics , optics , aerosol , computer science , engineering , telecommunications , detector , composite material , chemical engineering
Possible errors in sampling fog droplets with the cascade impactor are discussed and data are presented which were obtained from 25 fogs by the use of a specially modified impactor in a small portable wind‐tunnel. A very wide range of drop diameter (< 1 to > 100 μ) was found, with great numbers of very small drops and great variability in size‐distribution. Agreement between the visual range as calculated from the drop measurements and the actual visual range was usually closer than a factor of two, though in some cases there was no such agreement.