Radiocarbon Activity Variation in Dated Tree Rings Grown in Mackenzie Delta
Mackenzie District Northwest Territories
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CitationFan, C. Y., Tie-Mei, C., Si-Xun, Y., & Kai-Mei, D. (1986). Radiocarbon activity variation in dated tree rings grown in MacKenzie Delta. Radiocarbon, 28(2A), 300-305.
PublisherAmerican Journal of Science
DescriptionFrom the 12th International Radiocarbon Conference held in Trondheim, June 24-28, 1985.
AbstractWe measured the Delta-14C values in 57 rings (from AD 1824 to 1880) of a white spruce grown in Mackenzie Delta (68 degrees N, 130 degrees W), as part of our continuing study of the Delta-14C variation related to solar activities. The values exhibit a 10 per mil fluctuation with an 11-year periodicity anti-correlated with the solar activity cycle. We also measured the Delta-14C 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.