Open Veils · Answer
How abruptly did the Younger Dryas end?
The Younger Dryas did not fade — it snapped. GISP2 ice core data shows Greenland snow accumulation doubled in as little as one to three years, and dust proxies indicate atmospheric reorganisation in under 20 years. Randall Carlson and the Comet Research Group argue this abruptness is the signature of a catastrophic external trigger, not slow orbital drift. The mainstream 'gradual circulation' explanation cannot account for a threshold event of this violence.
Evidence
- The GISP2 ice core study (SUNY Research Connect, confirmed 2025–2026) delivers the most precise constraint on record: snow accumulation — a direct regional climate variable, not merely a circulation proxy — doubled possibly within one to three years at the Younger Dryas termination, approximately 11,700 years ago.
- Graham Hancock, in Magicians of the Gods (2015), synthesises this data alongside the cultural memory argument: every major post-glacial civilisational myth — the Flood, the Fire from Heaven — encodes this exact abrupt boundary.
- Oxygen isotope data from multiple Greenland cores bracket the full transition at ~50 years; dust concentrations compress that window to under 20 years.
- Per the published GISP2 data, this 'extremely short timescale places severe constraints on the mechanisms underlying the transition.'
- A YouTube documentary (April 2026) further synthesises the palaeoclimate record showing 8–10°C of warming in under five years at termination — a figure that makes gradual oceanic explanations statistically implausible.