Study of dropsize distribution in warm clouds subjected to repeated seeding
Keywords:Instrumentation, Weather Modification Operations
AbstractWarm seeding experiments, using aircraft, were conducted in three different regions in India during the summer monsoon of 1973. Cloud drop samples were obtained, during these experiments, in a few cases of isolated cumulus/cumulus complexes while they had been repeatedly seeded. For this purpose, glass slides coated with magnesium-oxide smoke were exposed by hand operated gadgets through the window of the seeder aircraft. Analysis of the data collected pointed out marked changes in the microstructure of the clouds following seeding. The drop size distribution broadened. The median volume diameter increased. The drop concentration decreased. The liquid water content increased. It was argued that the features noticed as above could be due to the combined effect of the accelerated condensation and coalescence processes following seeding.
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