Tree ring dating and climate change

tree ring dating and climate change - He used a technique called “dendro radiocarbon wiggle matching,” which calibrates radiocarbon isotopes found in the sample tree rings with patterns known from other places in the world that have already identified chronologies, such as the long european oak chronology or the bristle cone pine trees of north america. Individual trees are selected based on their apparent age—the oldest provide the longest climate histories—and positions that are likely to make the trees most sensitive to environmental conditions, such as away from streams or springs that can mask the potential moisture-sensitive history in the annual rings. Handful of tree ring samples stored in an old cigar box have shed unexpected light on the ancient world, thanks to research by archaeologist sturt manning and collaborators at cornell, arizona, chicago, oxford and vienna, forthcoming in the june issue of the journal of archaeological science. The ring patterns from the dead trees can be matched up to the rings of the living wood in a process called cross dating, which allows them to establish the date the dead tree began growing and its ring patterns until it died.

Tree Stories: How Tree Rings Reveal Extreme Weather Cycles

New BYU study documents extreme 16-year drought in Utah BYU Geography Professor Matt Bekker uses dendrochronology ...