aerosols
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How Hard Is It to Dim the Sun?
Solar radiation management is gaining traction as a climate intervention—but new research warns that real-world constraints make it riskier and more uncertain than most models suggest.
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Dust May Beat Black Carbon at Speeding Up Snowmelt in the Himalayas
Tiny dust particles at high altitudes are having a greater effect on snow-darkening than previously thought, accelerating the loss of glaciers.
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Tropical Cyclones on Track to Grow More Intense as Temperatures Rise
Aerosols have compensated for greenhouse gases, but won’t in future
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Have We Crossed the 9 Planetary Boundaries?
“The world needs to awaken itself to the looming catastrophe of global warming,” said Jeffrey Sachs, Director of the Earth Institute, at a recent meeting in Muscat. “We must provide a safe operating space where vested interest and lobby-driven policies will not see the world marching into disaster.”
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Could Reducing Global Dimming Mean a Hotter, Dryer World?
Despite concerns over global warming, scientists have discovered something that may have actually limited the impact of greenhouse gases in the atmosphere in recent years by reducing the amount of sunlight reaching the surface of the Earth. In research they published last year in the journal Geophysical Research Letters, a team led by Beate Liepert…
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
