Scientists estimated global average carbon dioxide concentration at 397.2 parts per million (ppm) in 2014, as the global growth rate of carbon dioxide continues to accelerate. 

Montzka in a snow pit in Antarctica
Monday, May 18, 2015

Some of the chemicals that replaced ozone-harming CFCs are long-lived greenhouse gases. At NOAA's lab in Boulder, Colorado, chemist Steve Montzka leads the effort to monitor the concentration of CFC-substitutes and their potential impact on global warming.

Tuesday, April 14, 2015

While many of us were wrapped up in March Madness this spring, Alaska residents and people across the globe participated in a different kind of competition.

The extreme atmospheric pressure pattern that favored record-breaking snow totals across parts of the U.S. East left Alaskans asking, “Where’s winter?”