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<br />\.\~1 <br /> <br />. <br /> <br />. <br /> <br />has a precipitation measurement network established to see if <br />there are regions where the precipitation ia incr.eased and/or <br />decreased when clouds are seeded. The experimental area <br />extends some 200 miles to the east of s target area in the <br />Bridger Range. This program is just getting underway, and <br />a major portion of the work is being done in conjunction <br />with a private research group. <br /> <br />South Dakota School of Mines and Technology has assembled a <br />group of scientists with broad interests. Their field pro- <br />gram, conducted in two separate locations, concentrates on <br />SUllllller convective storms. The group is making a thorough <br />study of cumulus cloud characteristics as well as randomized <br />seeding experiments. They use silver iodide dispensed from <br />airborne generators in most of their experiments. Two groups <br />of private meteorologists are assisting in special phases of <br />the program. <br /> <br />In the Pacific Northwest three groups are at work studying <br />the feasibility of retarding precipitation on the western <br />side of the Cascade Range and increasing it on the eastern <br />side. The results of this research hopefully will pennit the <br />shift of some precipitation from the western area of surplus <br />to the eastern area of deficient precipitation. If success- <br />ful, the techniques developed could have for reaching effects <br />wherever a "rainshadow" exists. <br /> <br />On opposite sides of the Great Basin, Utah State University, <br />with the help of a private meteorological firm, and the <br />University of Nevada are studying different approaches to <br />increasing the precipitation of the basin. As their program <br />develops, Utah State University scientists will study the <br />difference in effect of remote-controlled silver iodide gen- <br />erators located in the valley just to the west of the Wasatch <br />Front and those located an the ridge. The group has developed <br />a unique telemetry system for the remote reporting of precip- <br />itation and temperature in the mountainous experiment area to <br />facilitate evaluation of the seeding. . <br /> <br />The University of Nevada's Desert Research Institute is <br />stUdying several types of storm systems which occur along <br />the Sierra Nevada. They sre using dry ice dispensed from <br />aircraft. The nature of the clo\4d systems in the Reno area <br />provides an opportunity for a natural outdoor laboratory. In <br />order to improve the effectiveness of the outdoor laboratory, <br />a data acquisition system is being developed to provide a <br />real-time display on the ground of the information being <br />collected by the aircraft. In addition, DRI is seeding <br />selected storms in northeast Nevada in cooperation with a <br />private group of meteorologists. <br /> <br />13 <br />