科研之友
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摘要
A regional offset (Delta R) from the marine radiocarbon calibration curve is widely used in calibration software (e.g. CALIB, OxCal) but often is not calculated correctly. While relatively straightforward for known-age samples, such as mollusks from museum collections or annually banded corals, it is more difficult to calculate Delta R and the uncertainty in Delta R for C-14 dates on paired marine and terrestrial samples. Previous researchers have often utilized classical intercept methods that do not account for the full calibrated probability distribution pdf). Recently, Soulet (2015) provided R code for calculating reservoir ages using the pdfs, but did not address Delta R and the uncertainty in Delta R. We have developed an online application for performing these calculations for known-age, paired marine and terrestrial C-14 dates and U-Th dated corals. This article briefly discusses methods that have been used for calculating Delta R and the uncertainty and describes the online program deltar, which is available free of charge.
- 出版日期2017-10
