Tree section cross wood pith heartwood heart bark structure growth dead weebly through oak composes Tree ring climate insights method analysis lamont doherty past open may centuries 19th displayed 20th lab section cross sample observatory Methodology formed
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‘tree story’ explores what tree rings can tell us about the past
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6: tree ring principle (taken from [bn01]).Principle bn01 New tree ring analysis method may open insights to past climate.
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