Dansgaard-Oeschger events: 25 rapid climate fluctuations during last glacial period. Dansgaard-Oeschger events are rapid climate fluctuations that occurred 25 times during the last glacial period Some scientists suggest these events occur quasi-periodically with a recurrence time of about 1,470 years, though this is debated These events typically involve sudden temperature increases over a few decades followed by prolonged cooling lasting centuries or millennia
Dansgaard-Oeschger events were rapid climate swings that occurred 25 times during the last glacial period, some possibly recurring every ~1,470 years (though debated). These events featured sudden temperature jumps over decades followed by prolonged cooling lasting centuries. Heinrich events precede these warmings, and while mechanisms remain uncertain, ocean circulation changes may be involved. The primary evidence comes from Greenland ice cores. Bond events show comparable cyclicity in the more recent Holocene period.
Key Facts
- Dansgaard-Oeschger events are rapid climate fluctuations that occurred 25 times during the last glacial period
- Some scientists suggest these events occur quasi-periodically with a recurrence time of about 1,470 years, though this is debated
- These events typically involve sudden temperature increases over a few decades followed by prolonged cooling lasting centuries or millennia
- Heinrich events are cold spells that precede the warmings of Dansgaard-Oeschger events
- The primary evidence for Dansgaard-Oeschger events comes from Greenland ice cores
- The exact mechanisms driving these events remain uncertain but may be linked to ocean circulation changes
- Bond events are comparable climate cyclicity during the Holocene
Source: Cold War Secrets and The Discovery of Catastrophic Climate Change by The Randall Carlson