Radiocarbon Activity Variation in Dated Tree Rings Grown in Mackenzie Delta

• Published in: Radiocarbon
• Main Authors: Fan, C Y, Tie-Mei, Chen, Si-Xun, Yun, Kai-Mei, Dai
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1986
• Subjects: General Earth and Planetary Sciences; Archeology; Mackenzie Delta
• Online Access: http://dx.doi.org/10.1017/s0033822200007402; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200007402

We measured the Δ 14 C 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 Δ 14 C 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 Δ 14 C 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.