Onset of the Younger Dryas Recorded with ¹⁴C at Annual Resolution in French Subfossil Trees

Subfossil trees with their annual rings constitute the most accurate and precise archive to calibrate the radiocarbon ( 14 C) method. The Holocene part of the IntCal curve is based on tree-ring chronologies, absolutely dated by dendrochronological matching. For the Northern Hemisphere, the absolute curve starts at 12,325 cal BP. For the early part of the Younger Dryas (YD) climatic event (≈ 12,850–11,650 cal BP), there are only a few floating...