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A Guide to Dendrochronology for Educators
These Web pages were created to be used by both teachers and students interested in learning more about dendrochronology, the study of tree rings. You can use the information here to supplement a lesson plan or to expand your basic knowledge of dendrochronology principles. Most of the images here were scanned using the original wood samples. The captions beside the pictures contain terminology used by dendrochronologists when referring to tree-ring characteristics.

Cornell researchers precisely date wood from ancient tomb in Turkey. Findings challenge many assumptions about Greek and Egyptian history

Dendrochronology: The Science of Tree Ring Dating
Background information on dendrochronology (who, what, where when),definitions, principles of dendrochronology, and how climatic changes or patterns in specific geographic areas can be traced by the study of old living trees.

Harold C. Fritts` Dendrochronology Pages

Istituto Italiano di Dendrocronologia

The ITRDB Dendrochronology Bibliographic Database

The Laboratory of Tree-Ring Research
The Laboratory of Tree-Ring Research was organized in 1937 as an outgrowth of the pioneering tree-ring studies initiated by Andrew Ellicott Douglass at the University of Arizona in 1906. A division of the College of Arts and Sciences, the Laboratory conducts a unique program of teaching and research in all aspects of dendrochronology. Graduate-level instruction is offered through cooperating academic departments, and a limited number of graduate research assistantships are available to qualified students. Current research efforts are directed toward the quantification of tree-ring parameters, the establishment of new tree-ring chronologies throughout the world, the use of tree-rings in the study of forest ecosystems, the reconstruction of paleohydrologic and paleoclimatic variables, and the documentation and development of prehistoric chronological controls.

The Laboratory of Wood Anatomy and Dendrochronology
Lund University, Sweden

Lamont-Doherty Earth Observatory Tree-Ring Laboratory
CURRENT RESEARCH ACTIVITIES: Presently T.R.L scientists are activily working in many parts of the globe persuing dendrochronological studies. In the boreal forests of Canada, Alaska, Mongolia, SIBERIA, and Kamchatka Dr's Jacoby and D'Arrigo are studying the ecology and paleoclimatology of the Northern Hemisphere. In Tasmania, New Zealand and southern South America, Dr's Cook, D'Arrigo and Villalba are studying paleoclimate records from the southern himishpere. In Southeast Asia, Nepal, Thailand and Indonesia, Dr's Cook, D'Arrigo and Krusic are studying ENSO and the Southeast Monsoon.

The Malcolm and Carolyn Wiener Laboratory for Aegean and Near Eastern Dendrochronology

The National Climatic Data Center
NCDC is the world's largest active archive of weather data. NCDC produces numerous climate publications and responds to data requests from all over the world. NCDC operates the World Data Center-A, Meteorology which is collocated at NCDC.

NOAA Paleoclimatology Program
Homepage of the NOAA Paleoclimatology Program at the National Geophysical Data Center, a central location for paleoclimate data, research, and education. NOAA Paleoclimatology helps the World share scientific data and information related to climate system variability and predictability.

Radiocarbon Calibration

Tree Rings: A Study of Climate Change
Tree rings provide a record of local climate during the life of the tree. Many trees are hundreds of years old, and a few live thousands of years. Thus the rings provide information that is not available from scientific records.

Tree rings can show where a wooden object was made. Niels Bonde explains Count the tree-rings, map the journey. British Archaeology, no 10, December 1995.

The University of Victoria Tree-Ring Laboratory
UVTRL was established in September 1992. It consists of a self-contained sample preparation room and a new laboratory facility. The lab contains two tree-ring measuring apparatus: i) a Velmex-type measuring stage linked to a digital encoder; and, ii) a WinDendro computerized tree-ring image processing system.

Wild Wings Heading South. Classroom Activity: Dendrochronology -- Log of Straws

The World Wide Web Virtual Library of Forestry

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   Last Updated: March 19, 1998.