Contact: Mari N. Jensen
University of Arizona
Caption: A core extracted from a living Douglas-fir tree in the Santa Rita Mountains south of Tucson, Ariz. Scientists use such cores to study the annual rings of trees, visible on the core as banding. Collecting such cores causes only temporary injury to the tree.
Credit: Copyright 2009 Daniel Griffin
Usage Restrictions: This photo may be used only to illustrate a story about the research described in the accompanying release, Hot with Decades of Drought: Expectations for the Southwest.
Related news release: Hot with decades of drought: Expectations for the Southwest