In Alaska, Gordon Jacoby (above), Rosanne D’Arrigo, Greg Wiles, and Nicole Davi \used tree rings to date volcanic eruptions and earthquakes. The Lab was able to create a millennial-length record of climate change and volcanic eruptions there. These trees were killed by ash from Mount Churchill around 800 AD. Photo by Nicole Davi
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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