Knowra Bølling oscillation Bølling oscillation The Bølling oscillation was a rapid warming episode around 14,700 years ago that marked the onset of the Bølling interstadial during the last deglaciation.
Atlantic meridional overturning circulation : A system of Atlantic Ocean currents that transports heat northward in surface waters and returns colder water at depth. Changes in this circulation are a leading explanation for abrupt North Atlantic temperature shifts.
Bølling interstadial : A relatively warm interval in northern Europe during the last deglaciation, beginning around 14,700 years ago. The oscillation names the rapid warming that opened this interstadial.
Greenland ice-core isotope record : Measurements of oxygen and hydrogen isotopes in Greenland ice used to infer past temperature and snowfall conditions. The sharp isotope shift is a defining record of the Bølling onset.
Bølling–Allerød : A warm interval during the last deglaciation, spanning the Bølling and Allerød phases before the Younger Dryas. The Bølling onset initiated this extended period of relative warmth.
Dansgaard–Oeschger event : An abrupt climate fluctuation recorded in Greenland ice, typically involving rapid warming followed by gradual cooling. The Bølling warming is one prominent abrupt event within this wider class.
Allerød oscillation : A relatively warm episode within the last deglaciation, following the Bølling interstadial in the conventional European sequence. It continues the sequence of late-glacial warming intervals that the Bølling began.
NGRIP δ18O chronology : A dated sequence of oxygen-isotope measurements from the NGRIP ice core spanning the last glacial period. It captures the abrupt Greenland warming near the event’s conventional start date.
Younger Dryas : A sharp return to near-glacial conditions in the North Atlantic region around 12,900 to 11,700 years ago. Its cooling interrupted the warm deglacial conditions that began with the Bølling.
North Atlantic Deep Water : Cold, dense water formed in the North Atlantic that sinks and flows through the deep ocean. Its formation and export help regulate the overturning circulation implicated in deglacial warming.
Greenland Interstadial 1 : The first major warm interval in Greenland’s late-glacial ice-core chronology, beginning about 14,700 years ago. This Greenland interval broadly corresponds to the Bølling–Allerød warm period.
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