Laboratory of Tree-Ring Research270



The Laboratory of Tree-Ring Research at The University of Arizona was founded in 1937 by A. E. Douglass, founder of the modern science of dendrochronology. The LTRR is a research unit in the College of Science at the University of Arizona.

The faculty, students, and scientific staff of the Laboratory of Tree-Ring Research (LTRR) are engaged in a diverse array of research programs which include fire history and fire ecology, multiproxy paleoclimatology, archaeology, biogeography, isotope geochemistry, paleoecology, biogeochemistry, geomorphology, numerical and statistical modeling, and even public health. These collections represent a small portion of the research performed at the laboratory.


For more information about collections from the Laboratory of Tree-Ring Research, visit


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