State of the Planet

News from the Columbia Climate School

Polished tree ring samples

At the Tree Ring Lab, the team sands and polishes the cores to bring out their anatomy. The researchers routinely sample 20 to 50 trees in the same site to compare and derive a common response from the ring widths. Photo by Nicole Davi

At the Tree Ring Lab, the team sands and polishes the cores to bring out their anatomy. The researchers routinely sample 20 to 50 trees in the same site to compare and derive a common response from the ring widths. Photo by Nicole Davi


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