'Fatigue' in the climate system
- the Paleocene-Eocene Thermal Maximum, when temperatures 56 million years ago rose rapidly
- the sharp drying of North Africa, 9,000-5,000 years ago
- serial collapses of the overturning circulation in the North Atlantic (in common parlance, "the Gulf Stream shutting down")
- sharp warmings - Dansgaard-Oeschger events - recorded in Greenland ice cores.