End of The Climate Period
Measurements of oxygen isotopes from the GISP2 ice core suggest the ending of the Younger Dryas took place over just 40 – 50 years in three discrete steps, each lasting five years. Other proxy data, such as dust concentration, and snow accumulation, suggest an even more rapid transition, requiring about a 7 °C (12.60 °F) warming in just a few years. Total warming was 10 ± 4 °C (18 ± 7 °F).
The end of the Younger Dryas has been dated to around 11.55 ka BP, occurring at 10 ka BP (radiocarbon year), a "radiocarbon plateau" by a variety of methods, with mostly consistent results:
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11.50 ± 0.05 ka BP — GRIP ice core, Greenland 11.53 + 0.04
− 0.06ka BP — Kråkenes Lake, western Norway. 11.57 ka BP — Cariaco Basin core, Venezuela 11.57 ka BP — German oak/pine dendrochronology 11.64 ± 0.28 ka BP — GISP2 ice core, Greenland
Read more about this topic: Younger Dryas
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