In 1989, Gordon Jacoby and Rosanne D’Arrigo (above), the Lab’s first PhD student and now associate director of the Division of Biology and Paleo-Environment, published a landmark reconstruction of temperatures dating back 300 years across North America. The records show the effects of global warming. Photo courtesy of Gordon Jacoby
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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