Antarctic Warming

Antarctic ice loss will cause catastrophic sea level rise Despite being the coldest place on Earth, Antarctica is very vulnerable to global warming and represents the world’s largest source of potential sea level rise. Many of its ice shelves are …
Arctic Sea

Arctic Sea Ice

Climate change is a key driver of Arctic Sea Ice decline Sea ice in the Arctic is rapidly disappearing and the decline is accelerating. Climate change is a key driver of this trend, with the Arctic warming twice as fast …
Tipping Points

Ice Sheet Tipping Points

Pushing global temperatures past these thresholds can trigger irreversible changes even if we do not add any further CO2 to the atmosphere. These changes may be abrupt or may take hundreds of years, but once the threshold is passed they cannot be reversed.


Alaska: Climate Change Ground Zero

The Earth’s temperature is now increasing faster than anytime in the last 1,000 years. Alaska and the Arctic, temperatures are rising at twice the global rate—more rapidly than anywhere else in the world, making the region ground zero for climate change. The best estimate is that human activity is responsible for all of the observed increase in global temperatures since 1985. The effects of the temperature changes are transforming a once-frozen seascape into an evolving, navigable ocean. These rapid changes occurring in the North have created a new Arctic climate system.

Arctic Winter Sea Ice

Arctic Winter Sea Ice Reaches Record Low

On March 19, 2015, the National Snow and Ice Data Center (NSIDC) announced that the maximum extent of Arctic sea ice cover this winter was the lowest ever recorded: 5.61 million square miles (14.54 million square kilometers) on February 25.

Close up photo of small snow mountain with the sun and mountains in the background. New Record for Temperature

New Record for Temperature Whiplash

U.S. temperature extremes in 2014 have been exceptional—with record heat in the West and cooler than average temperatures in the East—and many scientists think climate change may be contributing. Temperature extremes occur when regions experience temperatures at the top or bottom 10% of the historical range of recorded values.