grizzly bears
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Grin and Bear It? Reintroducing Grizzlies to the North Cascades Provokes Strong Emotions
Decades after the last grizzly bear was seen in Washington State’s North Cascades, efforts to bring them back have been met with both enthusiasm and resistance.
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Glacier Melt to Redirect Alaska’s Alsek River, Endangering World-Famous Rafting Route
As a glacier in southern Alaska melts, a major river is likely to shift course within the next decade, putting the future of local fisheries and a popular rafting path at risk.
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Rising Water Temperatures Could Be A Death Sentence For Pacific Salmon
A new report shows a dire situation for salmon in Washington State. Populations are reeling from habitat loss, flooding and the repercussions of climate change.
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A New Global Archive Helps Researchers Chart Changes in Arctic Animals’ Behavior
Researchers from around the world have established a new archive of data documenting changes in the movements of animals in the far north.
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Studying the Farthest-North Trees
A team led by Kevin Anchukaitis of the Lamont-Doherty Earth Observatory Tree Ring Lab is currently in Alaska’s Arctic National Wildlife Refuge, studying the effects of changing climate on trees. Working near the treeline, they’re taking cores from spindly white spruces to measure weather of the past.
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
