square kilometers Archives

As Arctic temperatures rise, tundra fires increase, researchers find

CHAMPAIGN, Ill. — In September, 2007, the Anaktuvuk River Fire burned more than 1,000 square kilometers of tundra on Alaska’s North Slope, doubling the area burned in that region since record keeping began in 1950. A new analysis of sediment …

Arctic sea ice reaches lowest 2010 extent, third lowest in satellite record

The Arctic sea ice cover appears to have reached its minimum extent for the year, the third-lowest recorded since satellites began measuring sea ice extent in 1979, according to the University of Colorado at Boulder’s National Snow and Ice Data C…