NOAA's report describes how climate change is scrambling ecosystems and threatening livelihoods in the Arctic region. (Patrick Pleul / dpa / Getty Images) The Arctic last season was the hottest it has ...

The Arctic just experienced its hottest year since record-keeping began more than a century ago, the National Oceanic and Atmospheric Administration announced Wednesday. Rising temperatures in the ...

Hundreds of Arctic rivers and streams are turning bright red-orange, not from chemical pollution, but from naturally occurring iron spilling from long-frozen ground as temperatures warm. The "rusting ...

Closing Mauna Loa and three other U.S. sites that track greenhouse gases would disrupt a decades-long record of the planet’s changing atmosphere. By Rebecca Dzombak More than 11,100 feet above sea ...

The Arctic last season was the hottest it has been in the past 125 years. The extent of sea ice during its usual maximum in March was the lowest in 47 years of satellite recordkeeping. The North ...