Dansgaard–Oeschger event  From Wikipedia, the free encyclopedia
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cores for the last 140,000 years, clearly indicating the greater
magnitude of the D-O effect in the northern hemisphere
DansgaardOeschger events (often abbreviated D–O events) are
rapid climate fluctuations that occurred 25 times during the
last glacial period. Some scientists (see below) claim that the
events occur quasi-periodically with a recurrence time being a
multiple of 1,470 years, but this is debated. The comparable
climate cyclicity during the Holocene is referred to as Bond
events.   The best evidence for Dansgaard–Oeschger events
remains in the Greenland ice cores, which only go back to the
end of the last interglacial, the Eemian interglacial. Ice core
evidence from Antarctic cores suggests that the
Dansgaard–Oeschger events are related to the so-called Antarctic
Isotope Maxima by means of a coupling of the climate of the two
hemispheres, the Bi-polar Seesaw.[1] If this rel