Cloud Merging and Seeding Efficiency

R C Grosh


The main goal of this pilot project was to begin to identify the principle mechanism for new cell generation in South African clouds which are suitable for cloud seeding activities, as cloud growth patterns may have a major impact on the effective placement of seeding material in all the cells of a storm case (Changnon et al. 1975). Feeder type mergers can be expected to maximise the efficient use of seeding material (as recycling is possible), while in daughter type mergers it is minimised and additional seeding may be necessary to treat all cells of a single dynamic entity. The key feature to be identified is whether the major new cells are essentially separate from the older cells or replace them in the same relative position in the moving storm system.

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