Models have predicted for some time that with every degree of global warming, the Arctic will see double or more.

Ice sheets in Greenland and Antarctica have lost 318 gigatons of ice a year for 16 years. Just one gigaton would fill 400,000 Olympic-sized swimming pools.

The flow of carbon and trace elements under Arctic sea ice will clarify how climate change will affect one of the fastest-warming regions of the world.

The movement of sea ice, expected to significantly increase this century, could lead to an exchange of microplastics and oil between Arctic neighbors.

"Two-cub litters—usually the norm for a healthy adult female—are likely to disappear in Baffin Bay in the next few decades if sea ice loss continues."

Sea spray aerosols similar to those in California are popping up during the Arctic winter, researchers say.

The loss of sea ice in the Arctic has opened pathways for a virus deadly to seals, otters, and other marine mammals, researchers say.

"...in the near future, we should keep an eye on the tropics if we want to better predict conditions in the Arctic."

Century-old ship logs offer a better picture of the history of Arctic sea ice. Get a close look at the records here.