Fig. 2: Stalagmite BER-SWI-13 chronology.
From: The Gulf Stream moved northward at the end of the Little Ice Age
a Development of the BER-SWI-13 chronology, comparing the preliminary cycle count (green) and the radiocarbon (black) to the final cycle count (blue), which is developed from both. The grey shaded area signifies the 2σ confidence interval of the radiocarbon chronology. The cycle counts plot outside the radiocarbon chronology errors at the top as the radiocarbon model used a rough estimate for the bomb spike, which was updated in the cycle counts. Black areas (left-hand side) mark depths modelled to the radiocarbon mean. b Radiocarbon data recorded in the stalagmite (purple) compared to the U-Th dates (cyan). The black arrow indicates the trajectory of the radiocarbon data if only influenced by the Suess Effect. Note that the radiocarbon ages here have not been corrected for dead carbon fraction and that the U-Th dates use (238U/232Th)initial = 5 ± 2.5. c Mean growth rates based on radiocarbon (black, 0.345 mm yr−1), preliminary (green, 0.373 mm yr−1), and final (blue, 0.360 mm yr−1) chronologies.
