INTCAL98 radiocarbon age calibration, 24,000-0 cal BP

The focus of this paper is the conversion of radiocarbon ages to calibrated (cal) ages for the interval 24,000-0 cal BP (Before Present, 0 cal BP = AD 1950), based upon a sample set of dendrochronologically dated tree rings, uranium-thorium dated corals, and varve-counted marine sediment. The C-14 a ge-cal age information, produced by many laboratories, is converted to Delt a(14)C profiles and calibration curves, for the atmosphere as well as the o ceans. We discuss offsets in measured C-14 ages and the errors therein, reg ional C-14 age differences, tree-coral C-14 age comparisons and the time de pendence of marine reservoir ages, and evaluate decadal vs. single-year C-1 4 results. Changes in oceanic deepwater circulation, especially for the 16, 000-11,000 cal sp interval, are reflected in the Delta(14)C values of INTCA L98.