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Science 12 September 1969:
Vol. 165. no. 3898, pp. 1123 - 1125
DOI: 10.1126/science.165.3898.1123
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Articles

Carbon-14 in Patagonian Tree Rings

J. C. Lerman 1, W. G. Mook 1, J. C. Vogel 1, and H. De Waard 1

1 Physics Laboratory, University of Groningen, Groningen, Netherlands

The radiocarbon activity found in tree rings from southern Argentina shows secular fluctuations which are synchronous with and of the same amplitude as those known for the Northern Hemisphere. Comparable measurements indicate that the activity in Patagonian trees is about five per mil lower than in European trees.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)