In 1937 A. E. Douglass, founder of the modern science of dendrochronology, established the Laboratory of Tree-Ring Research at the University of Arizona. The Tree-Ring Lab is recognized worldwide as a preeminent center for the advancement of tree-ring techniques and the broad application of dendrochronology in the social and environmental sciences.

Saturday, February 6

Saturday, February 6

Monday, February 8


Pages from the current issue of the Tree-Ring Times newsletter
The Tree-Ring Lab has resumed its departmental newsletter after a long hiatus. Read more...
Come to the University of Arizona for intensive summer tree-ring courses. Read more...
Map of Chaco Canyon and its possible wood sources
The dendro-provenancing technique shows where the trees used for Chaco Canyon great house timbers grew, and how this source area changed in the eleventh century. Read more...
oak in California
LTRR researchers Soumaya Belmecheri and Valerie Trouet are lead authors of a study showing the current Sierra Nevada snowpack to be the smallest in 500 years. Read more...
The STEMM team and their grant award
Margaret Evans from the LTRR in an environmental education innovation. Read more...
detail of the newsletter
Articles teaching tree rings to kids appear in a newsletter. Read more...