Post-Bomb Rise in Radiocarbon Activity in Denmark

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Science  25 Mar 1960:
Vol. 131, Issue 3404, pp. 921-922
DOI: 10.1126/science.131.3404.921


During the summers of 1958 and 1959 the increase in concentration of bomb-produced radiocarbon in Denmark was several percent higher than the average increase for the hemisphere. This additional increase is probably a carbon-14 equivalent to the spring peaks in strontium-90 fallout in the North Temperate Zone in the same years, and suggests latitudinal variations in carbon-14 contamination.