ice ages2
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Earth’s Climate History, Written in Dust
Dust blowing onto the oceans can help algae grow and pull CO2 out of the atmosphere. It influences the radiative balance of the planet by reflecting sunlight away. Scientists want to know what role this plays in the coming and going of the ice ages, and how it affects our climate.
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Tackling an Ice Age Mystery
In a new study in Nature, climate scientist Maureen Raymo and her colleagues show that variations in sunlight interact with Earth’s topography and the size of ice sheets to control Earth’s ice ages on 100,000 year cycles. One important finding: as ice sheets grow bigger, they also become more vulnerable to melting.
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Scientists Drill Deepest Hole off New Zealand
Layers of sand tell of fluctuations in climate, sea level
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CO2 Higher Today Than Last 2.1 Million Years
Study Offers Detailed Look at Past Greenhouse Gas Levels
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New Seafloor Cores Show Tight Bond Between Dust And Past Climates
Researchers hope to shed light on proposed manmade climate ‘repairs’
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
