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Tree Rings Show Unprecedented Rise in Extreme Weather in South America

Tree Rings Show Unprecedented Rise in Extreme Weather in South America

July 7, 2020
climate response   Drought  

A new South American Drought Atlas reveals that unprecedented widespread, intense droughts and unusually wet periods have been on the rise since the mid-20th century.

Climate-Driven Megadrought Is Emerging in Western U.S., Says Study

Climate-Driven Megadrought Is Emerging in Western U.S., Says Study

April 16, 2020
climate change   climate response   Drought  

Scientists say a long-feared megadrought, worse than anything in recorded history, seems to be starting up in southwestern North America.

Climate Change Could Revive Medieval Megadroughts in U.S. Southwest

Climate Change Could Revive Medieval Megadroughts in U.S. Southwest

July 24, 2019
climate change   climate response   Drought  

New research by Columbia scientists examines the factors that caused severe, long-lasting droughts in the Southwest and suggests climate change may bring a new round of megadroughts.

Drought: A Wide-Angle Picture

Drought: A Wide-Angle Picture

April 30, 2019
climate change   climate response   Drought  

A new book, the second in a series of primers with the Earth Institute imprint, provides an interdisciplinary overview of drought, bringing together many fields including climate science, hydrology, and ecology.

Climate Change Has Made Western Megadrought 38 Percent More Severe, Say New Estimates

Climate Change Has Made Western Megadrought 38 Percent More Severe, Say New Estimates

December 13, 2018
climate change   Drought  

The current megadrought in the American West may be one of the most severe in the past 1200 years—and research by Columbia bioclimatologist Park Williams found climate change is partially to blame.

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