Open AccessMeasurement of water in clouds
Author(s) -
Lewis F. Richardson
Publication year - 1919
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1919.0035
Subject(s) - cloud computing , observer (physics) , meteorology , atmosphere (unit) , environmental science , atmospheric sciences , geology , physics , computer science , quantum mechanics , operating system
Since the initial data on which a weather prediction is to be based must, to be adequate, include the water-content of the clouds; and since observations of this are scanty, it will be well to survey what can be done in this respect. Three types of cloud can be measured: I. Clouds into which an observer can enter. Several observers, notably Conrad and independently Wagner, have measured the water in clouds on mountains by drawing a measured volume of atmosphere over absorbing substances. The information is summarised in Hann’s ‘Meteorology,' 3rd edition, p. 306. II. Cloud through which the sun’s outline can be seen and which also exhibit coronæ, as they often do. III. Uniform stratus, provided that some way can be found for measuring the size of the particles. II.Thin Clouds . For clouds through which the sun can be seen shining, it is remarkable that the edge of the sun’s disc, if observed through dark spectacles, almost invariably appears quite sharp, free from any blurring.