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There is evidence that this warming was quite rapid Greenland ice-core samples suggest that local temperatures increased by up to 10 ☌ (18 ☏) in just a few decades. A second abrupt climatic warming event, approximately 11,600 years ago, marked the end of the Younger Dryas and the beginning of the Holocene Epoch (11,700 years ago to the present) and Earth’s modern climate. This interval, the Bølling-Allerød interstadial, saw the rapid retreat of the immense Pleistocene ice sheets. The Younger Dryas, one of several very abrupt climatic changes that took place near the end of the late Pleistocene, was preceded by a sudden warming interval beginning approximately 14,700 years ago. The Younger Dryas was named after Dryas octopetala, a pale yellow wildflower of the rose family, typical of cold open Arctic environments.ĭuring the Pleistocene Epoch, extensive ice sheets and other glaciers formed repeatedly on large landmasses. After the period ended, an interval of rapid warming followed, and average temperatures increased to near present-day levels. The onset of the Younger Dryas took less than 100 years, and the period persisted for roughly 1,300 years. The Younger Dryas was characterized by cooler average temperatures that returned parts of Europe and North America to ice age conditions.

Younger Dryas, also called Younger Dryas stadial, cool period between roughly 12,900 and 11,600 years ago that disrupted the prevailing warming trend occurring in the Northern Hemisphere at the end of the Pleistocene Epoch (which lasted from 2.6 million to 11,700 years ago).

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