Sudden Ice Age Warming Linked to El Nino

During the last ice age, temperatures in the North Atlantic region rose sharply and quickly about every 1,500 years. The result: massive discharges of melted ice into the ocean which disrupted weather patterns around the world.

The trigger behind these abrupt climate cycles–called Dansgaard-Oeschger events–is the subject of a long-running debate that bears on the ability of scientists to predict climate.