File:Younger Dryas And Air Temperature Changes.jpg
United States Geological Survey, Williams, R.S., Jr., and Ferrigno, J.G., eds., 2012, State of the Earth’s cryosphere at the beginning of the 21st century–Glaciers, global snow cover, floating ice, and permafrost and periglacial environments: U.S. Geological Survey Professional Paper 1386–A, 546 p. (Also available at https://pubs.usgs.gov/pp/p1386a.)
Modified from Alley (2000, p. 9, fig. 12).
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