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OPERATION IVY. Project 7.5. Dispersion of Gaseous Debris from Nuclear Explosions
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
This project was designed to provide information for the solution of two problems 1 dispersion of gaseous debris and 2 initial cloud dimensions. Observations that were made indicated that the major portion of the Mike cloud entered the stratosphere--the cloud top reached 120,000 feet with the mushroom base at about 67,000 feet. The tropopause height at the time of the detonation was about 58,000 feet. The top of the King cloud reached about 74,000 feet with the mushroom base at about 40,000 feet. Samples for the measurement of the world-wide distribution of induced gaseous activity tritium and carbon-14 were taken at widely separated geographical positions, including both northern and southern hemisphere points. These samples were periodically collected at each location over a period of six months following the detonations.
Unclassified Public Release Extracted version of report dated Nov 1952.
Approved for public release; distribution is unlimited.