Revision and Tentative Extension of the Tree-Ring Based 14C Calibration, 9200–11,855 cal BP

Abstract

We report radiocarbon calibration data based on the revised German oak and pine series. The age range of the absolutely dated German oak series has been extended to 10,430 cal bp. The German pine series is tentatively linked to the oak series by 14C, and now reaches back to 11,871 cal bp (±20 yr). The revisions of the tree-ring time scale of the German oak chronology solved long-standing apparent discrepancies in the mid-Holocene 14C calibration data sets. The calibration data set based on the floating German pine is now in close agreement with the Preboreal part of 14C calibration series obtained from most varve chronologies and corals.