The Thera and Aniakchak II volcanic eruptions in tree rings and ice cores

Friday, June 10, 2022

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The slab of bristlecone pine wood, showing the ring pattern on the polished top surface
Pearson/Salzer The double tree-ring marker event in bristlecone pine used to anchor the ice records

A new publication in PNAS Nexus led by LTRR's Charlotte Pearson combines ice-cores, tree-rings, radiocarbon and archaeology to narrow in on a date for the Thera eruption and confirm Aniakchak II (1628 BCE) as one of the highest sulfate eruptions in the last 4,000 years.