Nitrous oxide, a third greenhouse gas nearly 300 times more potent than carbon dioxide, stays in the atmosphere for an average of 114 years, according to the Environmental Protection Agency (EPA).
… nitrous oxide emissions are 12 times higher than previously thought and therefore more of a threat.
The group used a small plane with a probe on its nose to measure greenhouse gases over 120sqm of thawing permafrost in the North Slope of Alaska.
They found that nitrous oxide emissions reached what was previously thought to be the expected yearly limit within just one month in August 2013. [Source]