Along the San Andreas fault, fallen trees near Wrightwood, California, revealed when past earthquakes caused trauma to the trees, disrupting their growth. Dead trees allow access to full cross-sections of their rings, but getting them to the lab isn’t always easy. Photo courtesy of Gordon Jacoby
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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