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The sampling of rain and cloud drops using hygrophotographic plates covered with various kinds of oil
Author(s) -
Sivadjian Joseph
Publication year - 1957
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.49708335713
Subject(s) - sink (geography) , castor oil , environmental science , sampling (signal processing) , materials science , meteorology , petroleum engineering , composite material , geology , optics , chemistry , physics , geography , cartography , detector , biochemistry
The preparation of a hygrophotographic plate is described, gives excellent results in the sampling of cloud droplets, when the latter have diameters between 20 and 30 μ. To avoid the shattering of larger drops (100 to 200 μ) the plate should be smeared with a layer of castor oil. The droplets of water, owing to their density being greater than that of the oil, sink to the bottom of the oily film, are immediately absorbed by the gelatine and thus are recorded.