In the 1980s, the Lab began work in Asia that would develop into the Monsoon Asia Drought Atlas. “Tree One” (above) was the first tree cored in Mongolia by Gordon Jacoby. As soon as he examined the core, he knew the research had potential: he could see narrow growth during the Little Ice Age in the 1800s and very rapid growth during the 20th century as temperatures rose. Photo by Rosanne D’Arrigo
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COP31, the 2026 United Nations Climate Change Conference, aims to advance dialogue, strengthen consensus, and accelerate climate action on a global scale. From November 9–20, 2026 in Antalya, Türkiye, heads of state, ministers, scientists, business leaders, and civil society will gather to advance efforts in emission targets, climate finance, and adaptation and resilience. Once again, our experts, students, and global thought leaders from Columbia Climate School and across Columbia University are contributing to key events, sharing insights, and helping shape the dialogue toward ambitious, science-based solutions. Learn More