Bond event

Bond events were previously believed to exhibit a roughly c. 1,500-year cycle, but the primary period of variability is now put at c. 1,000 years.

[1][2] Gerard C. Bond of the Lamont–Doherty Earth Observatory at Columbia University was the lead author of the 1997 paper that postulated the theory of 1470-year climate cycles in the Late Pleistocene and Holocene, mainly based on petrologic tracers of drift ice in the North Atlantic.

[10][11] Most Bond events do not have a clear climate signal; some correspond to periods of cooling, but others are coincident with aridification in some regions.

Bond events have been detected in remote regions such as the central Andes of South America.

[18] Up to six Bond cycles during the upper and middle Holocene have been identified in three ice core records of the tropical Andes.