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Radiocarbon Activity Variation in Dated Tree Rings Grown in Mackenzie Delta

Published online by Cambridge University Press:  18 July 2016

C Y Fan ,
Chen Tie-Mei ,
Yun Si-Xun  and
Dai Kai-Mei
C Y Fan
Affiliation:
Department of Physics, University of Arizona, Tucson
Chen Tie-Mei
Affiliation:
Radiocarbon Laboratory, Archaeological Section, History Department Peking University, Beijing, China
Yun Si-Xun
Affiliation:
Radiocarbon Laboratory, Archaeological Section, History Department Peking University, Beijing, China
Dai Kai-Mei
Affiliation:
Department of Physics, Nanjing University, Nanjing, China
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Abstract

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We measured the Δ14C values in 57 rings (from AD 1824 to 1880) of a white spruce grown in Mackenzie Delta (68°N, 130°W), as part of our continuing study of the Δ14C variation related to solar activities. The values exhibit a 10‰ fluctuation with an 11-year periodicity anti-correlated with the solar activity cycle. We also measured the Δ14C values in 6 rings (from AD 1940 to 1945). The abnormally high value in the 1943 ring may be due to two large solar flares occurring in 1942.

Type
II. Natural Variations
Information
Radiocarbon , Volume 28 , Issue 2A , 1986 , pp. 300 - 305
Copyright
Copyright © The American Journal of Science 

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