Seeding Experiments in Subcooled Stratus Clouds

Seeding experiments with dry ice and silver iodide are described. The experiments indicate that it is possible to dissipate large cloud areas by seeding them with dry ice if the temperature is below approximately −4C and the cloud decks are stable. For successful silver iodide seedings, the cloud temperature should be around −10C and the seeding rate should be of the order of 100 gm AgI per mi.