11 Jan '18, 3pm

What is Behind Rising Levels of Methane in the Atmosphere?

A team of scientists led by John Worden of NASA’s Jet Propulsion Laboratory may have solved a puzzle involving a potent greenhouse gas. Atmospheric methane levels have been rising, so Worden and colleagues applied some new analyses of satellite and ground-based data to more accurately pinpoint the sources. The concentration of methane in the atmosphere has risen sharply —by about 25 teragrams per year — since 2006. In recent years, different research teams have come up with viable but conflicting explanations for the increase. Some teams have published evidence showing that emissions from biogenic sources is driving the increase. Wetlands, ruminants, and rice paddies—all home to methane-producing microbes—are some of the major sources of biogenic methane. Other teams have argued that a simultaneous increase in atmospheric ethane , a key component of natural gas, implies th...

Full article: https://earthobservatory.nasa.gov/IOTD/view.php?id=91564&...

Tweets

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