© Asgeir Helgestad
This is the story of 'Misha', as I have come to know her. Both I and my research have been deeply affected by a polar bear I have never met face to face.
Permafrost near Norilsk, Russia.
Romzes333 / shutterstock
Climate change is thawing permafrost and increasing the risk of these accidents, and the region has fewer of the bacteria that can 'clean up' oil spills.
Salmon spawn in an Alaska river.
As climate change warms northern rivers and changes precipitation patterns, some types of cold-loving fish are failing.
Snowshoe hares are moving further into the Arctic.
Dee Carpenter Originals / shutterstock
As snow melts and landscapes change, there will be winners and losers.
This Arctic heat wave has been unusually long-lived. The darkest reds on this map of the Arctic are areas that were more than 14 degrees Fahrenheit warmer in the spring of 2020 compared to the recent 15-year average.
Joshua Stevens/NASA Earth Observatory
The Arctic is warming about twice as fast as the planet as a whole, with serious consequences. Scientists have been warning about this for decades.
Temperature anomalies from March 19 to June 20 2020. Red colors depict areas that were hotter than average for the same period from 2003-2018; blues were colder than average.
Models have predicted for some time that with every degree of global warming, the Arctic will see double or more.
The wet and low-lying East Siberian Arctic is likely to be a major methane source in the coming decades.
A cruise ship leaves Resolute Bay, Nunavut, in the summer of 2014.
(Silviya V. Ivanova)
Arctic cod are key prey for seals, whales and seabirds. What happens when ship noise drives them away?
Ships are framed by pieces of ice in Frobisher Bay in Iqaluit, Nunavut, in July 2019. Canada plans to ban the use of heavy oil on commercial vessels, which will have economic consequences in the Arctic.
The Canadian Press / Sean Kilpatrick
The next federal budget will be decisive for Canada's North. Will the government put in the money to achieve its many priorities in the Arctic?
Temperatures are warming faster in the Arctic than anywhere else in the world. Water and sewer pipes in Iqaluit, Nunavut, are cracking during the winter as the ground shifts.
THE CANADIAN PRESS/Sean Kilpatrick
New research finds that chlorofluorocarbons (CFCs) and other ozone-depleting substances have boosted the effects of climate change in the Arctic.
Some lakes in the Arctic are expanding and others are disappearing as permafrost thaws.
This lake north of Inuvik, N.W.T., is expanding as the ice wedges (darker lines leading away from the lake) around this lake melt and the ground subsides.
Hundreds of thousands of lakes, rivers and streams in the Arctic exist only because of the permafrost that lies beneath them. The warming Arctic threatens to change that.
Over 100,000 narwhals swim the Earth’s Arctic waters.
The long tusk of the male narwhal earned these whales their fanciful nickname. But there's more to these Arctic mammals than their unique spiral tooth.
A scientist checks cracks in the Arctic sea ice after a storm (April 2015, N-ICE2015 expedition).
Warm summers aren't the only threat to Arctic ice – increasingly intense winter storms are also weakening and reducing ice cover.
Warming in the Arctic is more intense than it is in the rest of the world.
More than 600 experts will spend the next year drifting in Arctic waters to gain a better understanding of how climate change is affecting the region and how it can be fought.
Chase Dekker / shutterstock
Rising sea levels, unstable weather, and a much smaller carbon budget.
Drift ice forming in the Baltic Sea, where microplastic concentrations are at levels similar to those in the Arctic. The incorporation of microplastics into sea ice affects how well the ice absorbs or reflects solar energy.
Levels of microplastics in the ocean are rising. More study is needed to figure out how these microplastics affect the qualities and properties of sea ice, and what the potential impact may be.
A camera catches a huge Greenland shark in eastern Baffin Bay, near Disko Bay, Greenland.
The eastern Arctic and sub-Arctic marine areas of Canada are changing rapidly under climate change.
Sunset off the coast of Newfoundland.
Coastal communities are helping scientists understand the impacts of marine heatwaves — and find solutions.
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.
An old male reindeer weathers a heavy snow storm.
The winter of 2018-19 claimed 200 reindeer in Svalbard, Norway, according to a recent census.