The warming that ended the Younger Dryas took only about 40–50 years, with Greenland ice-core samples showing temperature increases of up to 10 °C (18 °F) in just a few decades.
Notes on verification
Confirmed by multiple independent sources including Wikipedia, NOAA-derived data, and peer-reviewed literature (Dansgaard et al., Nature 1989). Exact duration estimates vary slightly (10-50 years) depending on ice-core proxy and dating method, but the core claim of abrupt ~10°C warming within decades is well-supported by mainstream paleoclimate science. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.925 clusters=2 claim_tier=notable]
Sources
- Younger Dryas | Definition, Causes, & Termination (seed:history_and_archaeology)
- https://skepticalscience.com/print.php?n=3630 (corroboration)
- https://www.nature.com/articles/339532a0 (corroboration)