wpe pat at alcs tae et i i ite: + Le ” ss ts, aTfadhe be beg bebe vet te ede ea ee . . eRamd aMea cL UER Sh ae cttlleinslt Binchentiatilad ~ ode. pee all compartments of the earth's atmosphere and on its surface (10) | suggests that the overall representativeness of the data is good. 3. Transport of debris from regions of higher ratio in either the troposphere or stratosphere. Figures 1, 2, and 3 clearly eliminate this possibility in that from mid-1968 there are no other data in either the stratosphere or surface air of either hemisphere with ratios as high as the anomalies under consideration. In view of our conclusion regarding the representativeness of the data, it appears that there are no hidden compartments cr pockets in the atmosphere containing unexpected debris. 4, Tropospheric injections of Pu-239. A few major injections of Pu-239 in 1968 could theoretically have produced the high Pu-239/Sr-90 Observed from mid year onward. The actual amount of “excess® Pu=-239 in the surface air during the pericd of the anomaly, that is the amount not accountable as coming cut of the stratosphere, was estimated by using average ratics and Sr=-90 concentrations. that 22% of the surface air ratio (on the average) It was found was excess, which is equivalent to about 2 X 1079 dpm/m? of unaccountable Pu=-239., IT - 19 rte) .