By studying variations in tree rings in forests around the world, Neil Pederson and colleagues at the Tree Ring Laboratory at Columbia University’s Lamont-Doherty Earth Observatory in New York have created a record of droughts and wet periods dating back hundreds to thousands of years.
Tree Rings Record History of Drought
Using tree rings, researchers have created a record of droughts dating back hundreds to thousands of years.
By Lauren Gravitz and Peter Smith
Feb 6, 2014 12:00 AMNov 3, 2019 7:29 PM
Neil Pederson cores a living tree in August 2012 in Mongolia's Khorgo lava fields, located in Khorgo-Terkhiin Tsagaan Nuur National Park. Kevin Krajcik/Columbia University
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