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Contact: Mari N. Jensen
mnjensen@email.arizona.edu
520-626-9635
University of Arizona

Daniel Griffin, University of Minnesota

Caption: University of Arizona tree-ring researcher Daniel Griffin collects a core from the trunk of a ponderosa pine to study the tree's annual growth rings. He measures the width of such rings to study the monsoon rainfall history of the America Southwest.

Credit: (c) Scott St. George, University of Minnesota

Usage Restrictions: This image may only be used to accompany a story about the research described in the release, Monsoon Failure Key to Long Droughts in Southwest

Related news release: Monsoon failure key to long droughts in Southwest


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