tree rings

Young visitor looking at tree rings

How old are these redwoods, really?

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It’s the question that usually comes right after the one about height: “How old do you think this redwood is?”
And in many ways, the answer to this second question can be even more stunning than the first.

...Continued

A giant step for understanding redwood tree rings

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Today, Redwoods and Climate Change Initiative scientist, Allyson Carroll, shares her perspective on how she decodes the history of redwoods from tree rings. Imagine finishing a massive puzzle, one involving nearly half a million pieces and taking years to complete… it feels Continued

Dendrochronology: The Glue that Binds RCCI

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The first phase of the Redwoods and Climate Change Initiative was based upon understanding how past climate has affected the ancient redwood and giant sequoia forests.  To do this, the research teams relied upon the science of dendrochronology: the analysis of Continued

Climate Change Discoveries Make Media Splash

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You may have heard about the surprising discoveries of the League’s Redwoods and Climate Change Initiative (RCCI) program, which drew unprecedented media coverage yesterday. Did you see the coverage in the San Francisco Chronicle, the San Jose Mercury News, the Continued

Redwood tree cores.

Cross-section of a redwood tree?

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Since I was a little girl, I’ve enjoyed standing next to the large cross-section of redwood trunk on display at the entrance of Muir Woods National Monument. It boggles my mind that this redwood started growing in the year 909 Continued

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