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14C Activity and Global Carbon Cycle Changes
over the Past 50,000 Years

Fig. 2. Radiocarbon calibration data from various sources. Fig. 2.
Radiocarbon calibration data from various sources. (A) Calibration data from Cariaco leg 165, holes 1002D and 1002E (blue circles), plotted versus GISP2 calendar age assigned by correlation of detailed paleoclimate records. The thin black line is high-resolution calibration data from Intcal98 tree rings joined at ~12 cal. ka B.P. to the Cariaco PL07-58PC varve chronology. Red squares are paired 14C-U/Th dates from corals. Replicate measurements, including overlap between 1002D and 1002E, have been averaged. Light gray shading represents the Cariaco calibration curve shifted within limits of calendar age uncertainty. Dashed line shows equal 14C-calendar ages. Error bars are 1 sigma. (B) Cariaco site 1002 data set plotted versus other published 14C calibration data. Symbols are the same as above, with additional data from Lake Suigetsu varves (open circles), Bahama speleothem U/Th (open diamonds), and North Atlantic cores PS2644 (upside-down triangles) and SO82-5 (triangles) correlated to GISP2. Error bars for all records are 1 sigma.

Back to Hughen et al. Cariaco Basin Radiocarbon data

5 February 2004