What is tree ring dating

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Dendrochronology can help solve many environmental problems.

Tree-ring analysis can be used in a variety of ways to diagnose pollution effects in its early stages, and to help adjust certain irrigation projects.

If a pattern of individual ring widths in the two samples prove to be identical at some point, we can carry dating further into the past.

The bristlecone pine chronology in the White Mountains currently extends back almost 9,000 years continuously. Several pieces of wood have been collected that will extend this date back even further.

Checked through a variety of methods independent of tree-ring growth, this principle has proved to be valid.

Review all the principles of dendrochronology as complied by Chronology Building The climatic changes or patterns in specific geographic areas can be traced by the study of old living trees.

Simply put, dendrochronology is the dating of past events (climatic changes) through study of tree ring growth. Douglass from the University of Arizona, who noted that the wide rings of certain species of trees were produced during wet years and, inversely, narrow rings during dry seasons.

Botanists, foresters and archaeologists began using this technique during the early part of the 20th century. Each year a tree adds a layer of wood to its trunk and branches thus creating the annual rings we see when viewing a cross section.

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