“D–O signals [10-16°C warming events within decades to centuries] are not just seen in Greenland – they are registered globally.” – Liu et al., 2026

From 57,000 to 29,000 years ago, with Last Glacial atmospheric CO2 concentrations flatlining at ~200 ppm, there were 11 instances when Greenland abruptly warmed by 10-16°C within a span of just 50 to 200 years (Liu et al., 2026).

Wide-ranging pollen-based temperature and precipitation reconstructions affirm these Dansgaard-Oeschger (D-O) events did not just occur in Greenland, they were realized across the globe.

Winter warming intervals of 2-5°C and up to 5-20°C within decades (centuries) also occurred at pollen sites in Asia, Europe, South and Central America, Africa, Middle East, and Australia.

Thus, there is nothing remotely unusual or unprecedented about the rate or magnitude of modern global warming.

Image Source: Liu et al., 2026