Abstract
The IntCal09 and Marine09 radiocarbon calibration curves have been revised utilizing newly available and updated data sets from 14C measurements on tree rings, plant macrofossils, speleothems, corals, and foraminifera. The calibration curves were derived from the data using the random walk model (RWM) used to generate IntCal09 and Marine09, which has been revised to account for additional uncertainties and error structures. The new curves were ratified at the 21st International Radiocarbon conference in July 2012 and are available as Supplemental Material at www.radiocarbon.org. The database can be accessed at http://intcal.qub.ac.uk/intcal13/.
Highlights
Radiocarbon dating has transformed our understanding of the timing of events and rates of change in archaeological and environmental proxy records since it was developed in the late 1940s (Libby et al 1949)
The calibration curves were derived from the data using the random walk model (RWM) used to generate IntCal09 and Marine09, which has been revised to account for additional uncertainties and error structures
Comparisons of the contributing IntCal data sets allow a discussion of any systematic differences between the different data sets and their variability with time, location, and climate, as well as our understanding of their causes
Summary
Radiocarbon dating has transformed our understanding of the timing of events and rates of change in archaeological and environmental proxy records since it was developed in the late 1940s (Libby et al 1949). A modeled comparison of the new and the existing marine records with Lake Suigetsu (Bronk Ramsey et al 2012, supplemental online material) suggests that the variability of the reservoir ages for the period 14–45 cal kBP may have been underestimated in IntCal09/Marine09.
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