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.
Dansgaard-Oeschger events: 25 rapid climate fluctuations during last glacial 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
Sources
Study suggests abrupt climate change during the last ice age was ...eurekalert.org
Dansgaard-Oeschger events (D-O events) occurred more than 25 times during the last ice age and were first described 40 years ago. These ...
On the 1470‐year pacing of Dansgaard‐Oeschger warm eventsagupubs.onlinelibrary.wiley.com
A fundamental pacing period of ∼1470 years seems to control the timing of the onset of the Dansgaard-Oeschger events.
Nature Unbound II: The Dansgaard- Oeschger Cycle - Climate Etc.judithcurry.com
Dansgaard-Oeschger (DO) events are the most dramatic and frequent abrupt climate change events in the geological record.
Sudden Catastrophic Climate Events in The Past Had No Single ...sciencealert.com
These sudden phenomena, called Dansgaard-Oeschger events, took place dozens of times over the 100 millennia of the Last Glacial. But what was it ...
The rapid climate changes of the last glacial period - Pursuitpursuit.unimelb.edu.au
A series of abrupt warming and cooling events occurred during the last glacial period. These are known as Dansgaard-Oeschger (D-O) events, named ...
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