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LoginDendrochronology or tree-ring dating is the scientific method of dating tree rings also called growth rings to the exact year they were formed in a tree. As well as dating them, this can give data for dendroclimatology , the study of climate and atmospheric conditions during different periods in history from the wood of old trees. Dendrochronology is useful for determining the precise age of samples, especially those that are too recent for radiocarbon dating , which always produces a range rather than an exact date. However, for a precise date of the death of the tree a full sample to the edge is needed, which most trimmed timber will not provide. It also gives data on the timing of events and rates of change in the environment most prominently climate and also in wood found in archaeology or works of art and architecture, such as old panel paintings.
AMS radiocarbon dating of wood is a powerful tool for determining the age of wooden artifacts and archaeological samples. Carbon is a naturally occurring radioactive isotope present in the atmosphere. Living organisms absorb Carbon during their lifetime through the intake of carbon dioxide. When an organism, such as a tree, dies, it stops absorbing Carbon Over time, the Carbon in its remains begins to decay at a known rate, and radiocarbon dating shows the event, when approximately the tree has died. For the analysis we need 50 milligrams of wood material.
The Dendrochronology Lab of the Royal Institute for Cultural Heritage specialises in research into and dating of movable and immovable wood. Its team offer three complementary services: dendrochronology, the identification of wood species and dendroarchaeology, i.
Dating is the classical applications of dendrochronology. Samples are extracted from wood subjects ship wrecks, foundations, roof constructions, music instruments and the tree-ring widths are measured. The ring-width patterns are subsequently visually and statistically compared to regional chronologies.
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