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Articles on Arctic

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A helicopter drops water on a forest fire in Alaska. Michael Risinger/U.S. Army National Guard

As extreme fires transform Alaska’s boreal forest, deciduous trees put a brake on carbon loss and how fast the forest burns

A new study finds more deciduous trees like aspen are growing in after severe fires in the region, and that has some unexpected impacts.
Avian cholera is a highly contagious disease that has produced rapid population loss in Northern common eiders. (Shutterstock)

How Arctic sea ducks develop herd immunity from avian cholera

We can learn about the spread of diseases through populations by studying naturally occurring instances of herd immunity. Avian cholera in the Canadian Arctic provides a useful case study.
A leap and a plunge into the snow could earn this arctic fox its supper. Jupiterimages/PHOTOS.com via Getty Images

How do arctic foxes hunt in the snow?

Arctic foxes have a few special talents that help them sneak up on unseen prey and pounce.
The polar vortex influences the jet stream, which can bring cold winter weather to the U.S. and Europe. AP Photo/Bill Sikes

What exactly is the polar vortex?

The media often call unusually cold, snowy storms a 'polar vortex.' The real polar vortex isn't coming down to visit the lower 48, but changes to the polar vortex can influence winter weather.
Permafrost is thawing across the Arctic, releasing microbes and organic materials that have been trapped in the frozen ground for thousands of years. NOAA via Wikimedia Commons

Thawing permafrost is full of ice-forming particles that could get into atmosphere

New research shows that permafrost contains huge amounts of particles that make it easier for cloud moisture to freeze. Thawing permafrost is releasing these ice-nucleating particles.
Through the Paris Agreement, the world’s countries agreed to work to keep global warming well under 2 degrees Celsius. Saeed Khan/AFP via Getty Images

Why the US rejoining the Paris climate accord matters at home and abroad — 5 scholars explain

The US is formally back in the Paris climate agreement as of today. As one of the world's largest greenhouse gas emitters, it has a lot of work to do, with food security, health and safety at stake.
A boat navigates at night next to large icebergs in eastern Greenland. (AP Photo/Felipe Dana)

Arctic Ocean: climate change is flooding the remote north with light – and new species

The Arctic has been a remote place for much of its history. But climate change is bringing global problems and opportunities to its door.

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