FURTHER ANALYSES OF THE CLIMAX CLOUD-SEEDING EXPERIMENTS

A further examination of the Climax I and II randomized cloud-seeding experiments has revealed the following. 1) Cloud seeding had no effect on precipitation in Climax I after the Control stations had been chos en halfway through the experiment. 2) Faulty execution of the randomiz ation scheme resulted in a misleading precipitation climatology and a misleading relationship between cloud-top and 500-mb temperatures for the control days. 3) The method of assigning upper-level winds and tem peratures to experimental days emphasized widespread, synoptic-scale w eather systems with cloud tops far above 500 mb rather than the orogra phic ''blanket'' clouds that were sought. 4) Particle trajectory calcu lations show that it is unlikely that the silver iodide released from the ground could have affected precipitation at Climax in southwest fl ow, the category for which the greatest seeding effect was reported.