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Press Release 09-223

Growth Spurt in Tree Rings Prompts Questions About Climate Change

Recent growth in the rings of bristlecone pines in the western U.S. points to warmer temperatures at treeline

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Photo of man boring into tree and the words Audio Slideshow

Explore the desolate treeline environment in this audio slideshow.

Credit: Lisa Raffensperger, National Science Foundation

 

Photo of trees in mountains.

The researchers studied bristlecone pines (Pinus longaeva) at three sites in California and Nevada, close to the upper elevation limit of tree growth.

Credit: Matthew Salzer, University of Arizona


Download the high-resolution JPG version of the image. (495 KB)

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Photo of a tree trunk cross section.

The researchers' findings point to warmer temperatures as a cause of the recent surge in growth for bristlecone pines.

Credit: Matthew Salzer, University of Arizona


Download the high-resolution JPG version of the image. (510 KB)

Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.