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

Friday, June 10, 2022


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.