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I I I 'I I I I I I I I I I I I I I I I 8.0 RECOMMENDATIONS We recognize this is the first experimental seeding effort conducted in this region in which d!lta has been collected that could be used in an interpretation of the physical cloud processes. We further recognize that the measurements made during the season are not complete and that it is impossible to come to firm conelusions based on one season's data. However, we do feel that there is sufficient information available to suggest that some dynamic seed- ability does occur, on frequently enough cases, that it is reasonable to continue experimentation with the rain augmentation project. We also feel that there is some evidence that the precipitation response, to properly seeded cells, correlates with the ph~sical response hypothesized in our dynamic seeding concept. This evidence also supports the recommendation to continue the cloud seeding effort. We feel the combined experimental and operational effort, with "local control", is a good, workable approach. We suggest considera- tion be given to 50/50 randomization (versus 1/3-2/3) for future experiment s. The local radar, with quantitative reflectivity measurements, is clearly essential in the monitoring of the precipitation processes. We also suggest additional cloud physics measurements be obtained with the project aircraft to further clarify the precipitation. processes. The concept of computing the area of effect for a given seeded complex and using the rain volume in this area as a response variable appears to have significant promise for the eventual statistical analysis of the seeding effectiveness. In summary, we feel the results of this first season of experi- mentation were sufficiently positive to warrant continuation of the project in order to obtain additional physical and statistical evidence concerning the response of clouds to seeding. We believe the combined experimental and operational approach is a workable procedure. 125 -