Rivers of melted ice on a Western Greenland ice sheet drain into the ocean beneath the ice.
Photo via Caspar Haarløv/AP
Studies show that the Arctic is heating up twice as fast as the rest of the planet.
The Mackenzie River carves its way through the permafrost tundra of northern Canada.
inEthos Design / shutterstock
Climate change has caused a 60-fold increase in active landslides on one Canadian Arctic island.
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.
Ahu on Easter Island. Bryan Busovicki/Shutterstock.com
While extreme weather conditions represent a considerable challenge globally, some communities have been living with (and adapting to) similar events for centuries.
Freshwater cypress swamp, First Landing State Park, Va.
VA State Parks
Wetlands are some of the world's most undervalued weapons against climate change. They store huge quantities of carbon – but without better protection, many could soon be drained or paved over.
A 20-year-old experiment is testing whether filling the Arctic tundra with animals could keep carbon trapped in the ground.
Scientists on Arctic sea ice in the Chukchi Sea, surrounded by melt ponds, July 4, 2010.
Climate change is transforming the Arctic, with impacts on the rest of the planet. A geographer explains why he once doubted that human actions were causing such shifts, and what changed his mind.
Dan Bach Kristensen / shutterstock
The ice sheet is melting and permafrost is thawing. What's happening in Greenland will speed up climate change across the world.
Best-case scenario, how much are we locked into?
Set aside the politics. If by some miracle we turned off carbon emissions immediately, how would the climate respond?
The warming global climate is causing fundamental changes to the carbon cycle in northern parts of the world.
Global warming is changing the movement of carbon within northern ecosystems to the point where the Arctic could become a net source, rather than sink, of greenhouse gas emissions.
Carbon in some types of ancient permafrost is digested by greenhouse gas-producing microbes.
US Bureau of Land Management
Scientists are studying how carbon-rich permafrost known as yedoma acts much like frozen vegetables to hungry microbes -- and is becoming an additional source of heat-trapping gases.