the best science on the web about
permafrost

Permafrost
Image: National Geographic/Mikaela Howie

Permafrost

Our planet has a permanently frozen layer beneath the surface — permafrost. It lies in areas of the Northern Hemisphere where temperatures rarely rise above freezing.

How does climate change factor in? The permafrost has warmed, and scientists predict widespread melting by 2100. Investigate the consequences.

National Geographic
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Arctic Report Card: Permafrost

Arctic Report Card: Permafrost

Tracking the temperature and thickness of permafrost in various locations tells scientists where changes and warming trends are occurring. Take a look. More...

Article
NOAA
As Siberian Permafrost Melts, Methane Seeps Out

As Siberian Permafrost Melts, Methane Seeps Out

Climate change is melting permafrost, exposing soil, and letting loose highly flammable methane in Siberia. Learn about a plan to "turn back the clock" by lowering the temperature here. More...

Video
NBC
Fun Trivia: Permafrost

Fun Trivia: Permafrost

Take 5…questions, that is, to test what you know about permafrost. But you must act quickly: The longer you take, the fewer the points. More...

Interactive
FunTrivia.com
Permafrost Photo Gallery

Permafrost Photo Gallery

View vast areas of permafrost patterns, textures, and colors in the farthest reaches of the Northern Hemisphere. More...

Images
National Geographic
Pingos in Alaska National Parks

Pingos in Alaska National Parks

Q: What might you shout if you’re on the vast, flat permafrost and you see a hill rising from the landscape? A: Pingo! Watch how these projections form. More...

Video
National Park Service
Tundra and Permafrost

Tundra and Permafrost

It takes more than a shovel to dig deep into permafrost. Build on top of it, though, and your construction might "tilt like the Leaning Tower of Pisa." More...

Article
Exploratorium
What Lies Beneath

What Lies Beneath

Meet Dr. Larry Hinzman, an expert in why and where permafrost is thawing — and what that means for our planet. Take a look at the tools he uses and his ongoing satellite project with NASA. More...

Profile
NASA
Where Even the Earth Is Melting

Where Even the Earth Is Melting

See a vicious circle in action. Thanks to climate change, more heat from the Sun is reaching the Earth. Discover the permanent effects on permafrost. More...

Interactive
Sydney Morning Herald

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