Method of dendrochronology

Dendrochronology and our method

Dendrochronology or “tree-ring dating” is an exact method of dating wood and is based on growth ring differences. These differences are caused by prevailing climatic conditions. Weather variation in one region over a number of years results in a ring width growth time-series which is characteristic for those years and unique in time. The tree’s growth is measured by measuring the width of the annual rings.

Time-series of a piece of wood can be compared with reference time-series. By cross-dating time-series from one region, it is possible to get reference-chronologies which span several centuries.

Measuring the annual ring width

Traditionally, the measurings are carried out using measuring magnifier or measuring microscopes. A measuring magnifier consists of lenses and a measuring scale (scale: 0.1 mm).

Our method is based on measuring high-resolution digital photos. We use reflex digital cameras with a macro lens and take partial photos. The resulting resolution is about 2600 dpi (< 0.01 mm/pixel).