The 2,000-acre fire and others north of the Brooks Range fit a pattern of increasing wildfires in the treeless landscape. While most Alaska tundra fires are south of the Brooks Range, in Northwest or Western Alaska, fires north of the Brooks Range are becoming more common and bigger, according to scientists.

A significant flood-induced washout at milepost 315 on the Dalton Highway has closed the only road link to Alaska’s North Slope oil fields between mileposts 305 and 356, with emergency repairs and ongoing monitoring underway.

New research shows that permafrost soils hold massive quantities of mercury — nearly twice as much as is held in all other soils in the world, plus the mercury in the oceans and the atmosphere —

Just what exactly is permafrost? And what is happening now that it's warming up? To find out, we enter the Arctic Circle's secret world of ice and frozen history.

Snow is melting sooner and coming in later on the North Slope, and that, in turn, is having an affect on other ecological variables.

The size of a large caribou herd in Alaska's Arctic region has dropped by more 50 percent over the last three years, and researchers who have tentatively ruled out hunting and predation as significant factors for the decline are trying to determine why.