Tree ring cross dating

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Instead of working with entire cross sections of trees, dendrochronologists (tree-ring researchers) often use long, slender cores extracted from trees by a hollow tool.

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As the summer winds down and the transition to the cooler autumn occurs, the tree’s growth rate slows.As soil water declines through the summer, the cells become thicker-walled and more dense.Thus each annual ring consists of early (light) and late (dark) wood. Douglass, the 'father' of dendrochronology was interested in the affect of sunspots on the earth’s climate.It was digitized from a physical copy provided by the Laboratory of Tree-Ring research at The University of Arizona.For more information about this peer-reviewed scholarly journal, please email the Editor of Tree-Ring Research at [email protected]

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