“Throughout the life of these trees, Douglas firs have experienced a lot of different conditions,” Restaino said. “The conditions that have been the warmest and the driest have slowed their growth the most. With climate change, we expect the frequency of those conditions to increase.”

Co-authors on the study included David L. Peterson with the U.S. Forest Service’s Pacific Northwest Research Station in Seattle, Washington; and Jeremy Littell from the U.S. Department of the Interior’s Alaska Climate Science Center in Anchorage.

The study was funded primarily by the National Science Foundation, as well as by the U.S. Geological Survey Global Change Research Program, the U.S. Forest Service Pacific Northwest Research Station, and the U.S. Department of the Interior Alaska Climate Science Center.  

Media contact(s)

Christina Restaino, Environmental Science and Policy, [email protected], (Restaino is based in South Lake Tahoe.)

Kat Kerlin, UC Davis News and Media Relations, (530) 752-7704, [email protected]


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