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- W2487513639 abstract "We have observed A 14 C concentrations in the northern hemisphere temperate region in the bomb pulse period, using cross-dated tree ring samples. The tree-ring samples were taken from one 70-year-old and two 50-year-old red pines ( Pinus densiflora ) on Mt Chiak, Korea and from a 50-year-old red pine ( Pinus densiflora ) on Mt Kyeryong, Korea. Twenty-two tree-ring samples from four red pines ranging from 1950 to 2000 AD were pretreated to obtain holo-cellulose, combusted to CO 2 by an element analyzer (EA) and converted to graphite for δ 14 C measurement using the accelerator mass spectrometry (AMS) facility at Seoul National University. Our results for δ 14 C showed good agreement with those measured by other researchers at similar latitudes. The observed steady decrease of δ 14 C from 1965 to 2000 AD is described by a single exponential function with a lifetime τ = 15.99 ± 0.43 yr. This lifetime is similar to that of the high-latitude region in Europe." @default.
- W2487513639 created "2016-08-23" @default.
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- W2487513639 date "2002-01-01" @default.
- W2487513639 modified "2023-10-13" @default.
- W2487513639 title "<sup>14</sup>C Level At Mt Chiak and Mt Kyeryong in Korea" @default.
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- W2487513639 doi "https://doi.org/10.1017/s003382220003191x" @default.
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