"cooling" time for short-lived 1adi02 evey, by off-tas cletrinse. 2.0) oe ive materials’ to de cay ced os relcarc with due regard to metecrological concuiticns at the tine, This is a section on possible uczs cf radioactive matcrials in the study of the science of meteorology. Natural radon gas in the air can be helpful in understanding verticle movements of air from the land, Weapons tests have taught much with respect to lateral spread of air masses at various altitudes - how vain scavenges the atmosphere of particles - the rate of transport from the stratosphere to the troposphere and the removal time for water from the atmosphere, Experiments could be conducted using introduced radioactive materials under controlled conditions to study air flow and diffusion rates, hydrometeorology, L.G@ey condensation, precipitation and evaporation, and to study electricity of the atmosphere especially the possible relationship of electrical fields to the weather, As to effects of nuclear weapons testing on the weather the committee stated: 1, Nuclear Weapon debris was not effective as a seeder for rain, 2. The amount of ionization produced is insignificant in meteorological terms, 3, There has been no measurable decrease in the amount of direct sunlight reaching the earth Whereas volcanoes have been knovwm to decrease it by as much as 10-20% fcr appreciable periods of time, 4, The apparent recent increa. probably the result of "irnreved Conmittee on th r Co tenctpauny eC SPat _ ind in severe storms 1 Le .2thods of reporting Effects of Atc-ic radiation. F a7 ue Talis group viewed the rant rocers = moveiie, H .

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