The static mode of cloud seeding

Ice Crystal Multiplication

We have seen that the pioneering experiments of Schaefer and Langmuir suggested that the introduction of dry ice or silver iodide into supercooled clouds could initiate a precipitation process. The underlying concept behind the static mode of cloud seeding is that natural clouds are deficient in ice nuclei. For an excellent, more technical review of static seeding, see Silverman 1986 . As a result many clouds contain an abundance of supercooled liquid water which represents an underutilized...

The rise of the science of weather modification by cloud seeding

Cloud Seeding 1947 General Electronics

Throughout history and probably prehistory man has sought to modify weather by a variety of means. Many primitive tribes have employed witch doctors or medicine men to bring clouds and rainfall during periods of drought and to drive away rain clouds during flooding episodes. Numerous examples exist where modern man has shot cannons, fired rockets, rung bells, etc. in attempts to modify the weather Changnon and Ivens, 1981 . It was Schaefer's 1948a discovery in 1946 that the introduction of dry...