UNIVERSITY OF OKLAHOMA PROGRAM FOR STUDIES OF CONVECTIVE STORMS AND SCAVENGING OF RADIOACTIVE PARTICLES WALTER J. SAUCIER, SAMUEL J. HALL, and ROBERT Y. NELSON University of Oklahoma, Norman, Oklahoma ABSTRACT A description is presented of the objectives, the facilities, and the operations of the University of Oklahoma program for studying the role of convective storms in the scavenging and the washout of radioactive particles from the atmosphere. INTRODUCTION The broad objectives of the University of Oklahoma program are (1) to examine thunderstorm convection as a mechanism for fallout of nonaqueous particulates, especially radioactive particles, and (2) toadd to the knowledge of the physics of cloud growth and precipitation of such storms by the uSe of identifiable particulates such as radionuclides as tracers. The second objective is really a by-product of the first. At present we wish to determine the radioactive fallout and the variations in this fallout in thunderstorm rainfall, to determine the distributions of radioactivity in the thunderstorm environments, and to observe and measure the thunderstorm convection by means of rainfall records, ground meteorological records, weather radar surveillance, and routine meteorological data, METEOROLOGICAL SETTING The stratosphere acts as a reservoir for radioactive debris in- jected there during nuclear weapons tests. Owing to stratification, 523

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