Following a plateau in the early 2000s, global concentrations of the powerful greenhouse gas methane have hit new highs in recent years. Chemical fingerprint tests seem to rule out a major role for fossil fuels. With more than half a dozen possible natural and human sources, how will scientists figure out where it's coming from?
Hot temperatures roast the western United States
June 28, 2017
Thanks to warming winters and thawing permafrost, Arctic soil microbes are churning out carbon dioxide well after the end of the growing season ends. This extra source of atmospheric carbon may accelerate a regional warming trend that is already twice as fast as the global average.
Cyclone Mora hits vulnerable Bangladesh
June 9, 2017
The Boston Marathon takes place every year on the third Monday in April. The average daytime high temperature in April has been warming rapidly in recent decades, making uncomfortable race days more likely.
This year's Iditarod sled dog race is underway, but it was forced to start hundreds of miles farther north than usual due to poor snow conditions.
Mild days—perfect for an outdoor picnic or a nice hike—are expected to drop about 14 percent by the end of the century, according to new research.
Arctic sea ice on track to be among smallest winter maximums on record
February 17, 2017
Springtime melting and retreating sea ice allowed more sunlight to reach the upper layers of the ocean, stimulating widespread blooms of algae and other tiny marine plants which form the base of the marine food chain: a sign of the rapid changes occurring in a warming Arctic.
The oyster hatchery industry on the U.S. West Coast nearly collapsed when they were caught off guard by increasing acidity in the coastal waters. In Maine, an oyster grower is testing whether new NOAA-funded technology can prevent a repeat on the East Coast.