North Atlantic Oscillation
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Debunking the Solar-Cycle/North Atlantic Winter Weather Connection
The North Atlantic Oscillation is a key driver of winter weather patterns over the northern hemisphere. In recent years, research has claimed a correlation between the NAO and the 11-year solar cycle. A new paper debunks that claim.
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Climate and Cod
A new study finds that the climatological phenomenon known as the North Atlantic Oscillation contributes to fluctuations in the cod population off the New England coast, and could help fishery managers protect the population from future collapse.
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Greenland’s Ice Is Getting Darker, Increasing Risk of Melting
Feedback loops from melting itself are driving changes in reflectivity
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Study Undercuts Idea That ‘Medieval Warm Period’ Was Global
Vikings May Not Have Colonized Greenland in Nice Weather
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New Drought Atlas Maps 2,000 Years of Climate in Europe
Completes the First Big-Picture View Across Northern Hemisphere
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Converging Weather Patterns Caused Last Winter’s Huge Snows
A Warming World Can Still See Severe Storms
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20th Century One of Driest for Northwest Africa in 900 Years
Ancient Trees Give Context to Recent Droughts
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
