Localized effects induced by seeding supercooled clouds with dry ice and silver iodide

TitleLocalized effects induced by seeding supercooled clouds with dry ice and silver iodide
Publication TypeConference Proceedings
Year of Conference1951
AuthorsSchaefer, V. J.
Conference Name19th Annual Western Snow Conference
Series TitleProceedings of the 19th Annual Western Snow Conference
Date PublishedApril 1951
PublisherWestern Snow Conference
Conference LocationVictoria, British Columbia
KeywordsCloud Seeding, Silver Iodide, Weather Modification
Abstract

Condensation nuclei as condensation centers for the formation of cloud droplets. An automatic recording, condensation nuclei is used to detect the extreme variability in concentration of such nuclei. The seeding of clear air, supersaturated with respect to ice, with suitable nuclei causes the formation of ice crystals large enough to have a falling velocity within less than 1 minute after seeding. Various techniques of seeding stratus or cumulus clouds, using dry ice or silver iodide are described. Accounts of actual aerological seeding experiments made, and results obtained are indicated.