NASA - National Aeronautics and Space Administration

Three years of observations from NASA’s Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE) airborne mission were used in a new study that shows warmer temperatures and thawing soils may be driving an increase in carbon dioxide emissions from Alaskan tundra to the atmosphere.

The amount of methane gas escaping from the ground during the long cold period in the Arctic each year and entering Earth’s atmosphere is likely much higher than estimated by current carbon cycle models, concludes a major new study led by San Diego State University and including scientists from NASA’s Jet Propulsion Laboratory, Pasadena, California.

Despite large temperature increases in Alaska in recent decades, a new analysis of NASA airborne data finds that methane is not being released from Alaskan soils into the atmosphere at unusually high rates, as recent modeling and experimental studies have suggested. The new result shows that the changes in this part of the Arctic have not yet had enough impact to affect the global methane budget.

A C-23 Sherpa airborne science aircraft departed Wallops Flight Facility on a journey to conduct Earth science missions in Alaska from May to mid-November.