Abstract: Concentrations of artificial radioactivity and plant pollens in rain have been found to vary in phase during convective storms. Because pollens are tracers for low-altitude air, this result is most simply explained by ...

Abstract: Decisions on controlling emissions to reduce atmospheric aerosol concentrations require accurate information on ambient concentrations, composition and sources. This paper shows how filter sampling of ambient aerosols, ...

Abstract: Speculation concerning effects of pollutants on weather, especially rainfall, has intrigued scientists and laymen alike in recent years. Results from Project METROMEX suggest that rainfall is increased after a moving ...

Abstract: This work was undertaken to measure background silver in Illinois precipitation in the absence of any known seeding operations in on near Illinois. The rainfall-weighted mean concentration in samples from several stations ...

Abstract: The rain cleansing patterns observed in five rain situations, all characterized by convective structures, are presented. The data comprise radioactivity and pollen concentrations measured in sequential samples of rain water ...

Abstract: In a test of the use of indium as a particulate atmospheric tracer, both tagged and untagged rain showers were sampled at ground level in Oklahoma during May 1967. In 29 samples of untagged rain 6±3 nanograms of In per ...

Abstract: In an effort to determine whether it is feasible to use tracer techniques in the study of circulations and rain scavenging processes in severe convective storms, a pilot experiment using indium as tracer was conducted. A ...

Abstract: A sequential rain sampler has been developed that collects up to 70 samples from 35?70 mm of rain. Each sample has a volume of 500?1000 ml and represents 0.5?1.0 mm of rain. After all bottles are filled, any additional ...