SciencePrehistoric (c. 11,700 years ago)global (Greenland/North Atlantic)high confidence

The termination of the Younger Dryas cooling event occurred within a decade.

Notes on verification

Confirmed by multiple independent peer-reviewed sources (Dansgaard et al. 1989, Taylor et al. 1993) and NOAA synthesis citing Alley 2000, showing abrupt decadal-scale warming at Younger Dryas termination, with minor variation in exact timescale (10-20 years). [tier=gold indep_score=1.0 clusters=3 claim_tier=notable]

Sources