Most of Greenland is covered by Arctic ice.
AP Photo/John McConnico
In 1867, the US bought Alaska from Tsar Alexander II for a tidy sum of $7.2 million. Trump probably wouldn't be able to get that kind of bargain for Greenland.
Melting on top of sea ice off northwestern Greenland, June 2019.
Steffen M. Olsen/Twitter
Greenland's ice made headlines in June, as warm weather made for unseasonably widespread melting. And though this summer is still unfolding, the human fingerprint on Greenland's ice can't be denied.
outdoorsman / shutterstock
Algae at the bottom of the Arctic food chain relies on sea ice.
Extreme climatic events are harming plant communities in the Arctic. The resulting colour change is bad news for the region's carbon storage.
2016’s warm winter meant not enough snow for the start of the Iditarod sled dog race in Anchorage, so it was brought by train from 360 miles north.
For everyone from traditional hunters to the military, the National Park Service to the oil industry, climate change is the new reality in Alaska. Government, residents and businesses are all trying to adapt.
The Canadian Coast Guard icebreaker Louis S. St-Laurent sails past a iceberg in Lancaster Sound in 2008.
THE CANADIAN PRESS/Jonathan Hayward
New shipping opportunities are opening up in the Arctic as sea ice continues to recede. But travel is still dangerous and the region isn't equipped to deal with more vessel traffic.
Since 2005, the Barents Sea has become too warm for sea ice to exist south of the Polar Front.
Sea ice in the Arctic.
The link between melting sea ice and extreme weather has been known for a while, but now it's happening further afield.
An Arctic iceberg, pictured in 2015. This year, ice coverage has reached record lows for the early northern winter.
The end of 2016 has brought balmy Arctic temperatures and record low ice extent for the time of year. It's a freak event even by modern standards, and climate models point the finger firmly at humans.
China’s capacity to participate in Arctic affairs is still weak.
China has been very quiet in negotiations over fisheries regulations for the central Arctic Ocean. Why is the country's behaviour there so dramatically different from what it pursues in Antarctica?
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Breaking through the ice in Antarctica.
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Another great British summer.
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