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
Polished tree ring samples
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AGU25, the premier Earth and space science conference, takes place December 15-19, 2025 in New Orleans, Louisiana. This year’s theme—Where Science Connects Us—puts in focus how science depends on connection, from the lab to the field to the ballot box. Once again, Lamont-Doherty Earth Observatory and Columbia Climate School scientists, experts, students, and educators are playing an active role, sharing our research and helping shape the future of our planet. #AGU25 Learn More