Graph of radiocarbon dating accuracy dating of speleothems

There are separate graphs for the southern hemisphere and for calibration of marine data.To produce a curve that can be used to relate calendar years to radiocarbon years, a sequence of securely dated samples is needed which can be tested to determine their radiocarbon age.

graph of radiocarbon dating accuracy-85graph of radiocarbon dating accuracy-10

These are taken to be the boundaries of the 68% confidence range, or one standard deviation.The improvements to these curves are based on new data gathered from tree rings, varves, coral, and other studies.Significant additions to the datasets used for INTCAL13 include non-varved marine foraminifera data, and U-Th dated speleothems.In the example CALIB output shown at left, the input data is 1270 BP, with a standard deviation of 10 radiocarbon years.The curve selected is the northern hemisphere INTCAL13 curve, part of which is shown in the output; the vertical width of the curve corresponds to the width of the standard error in the calibration curve at that point.

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