 Depending on the specific ice core analysis consulted, the Younger Dryas is estimated to have lasted 1,150–1,300 years.Measurements of oxygen isotopes from the GISP2 ice core suggest the ending of the Younger Dryas took place over just 40 to 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, which would require about of warming in just a few years.