California’s 21st Century Megadrought

Jeffrey Mount and Michael Dettinger
Jeffrey Mount is a Senior Fellow at the PPIC Water Policy Center. Michael Dettinger is a Visiting Researcher, Scripps Institution of Oceanography and was a research hydrologist for the U.S. Geological Survey.

A recent paper on climate change in California and the West has been in the news and raising concerns. Based on extensive analysis of tree ring data—a good measure of summer soil moisture—the authors postulate that most of the region is in an unfolding “megadrought” that began in 2000 and is the second worst in […]

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