Permafrost thaw won’t run away with Earth’s climate

[drm604]

9. Looking at the abstract and editor's summary for the original article on Nature.com,

it appears to be not as clear cut as the Northern Journal's headline makes it sound.
http://www.nature.com/nature/journal/v520/n7546/full/nature14338.html

Large quantities of organic carbon are stored in frozen soils (permafrost) within Arctic and sub-Arctic regions. A warming climate can induce environmental changes that accelerate the microbial breakdown of organic carbon and the release of the greenhouse gases carbon dioxide and methane. This feedback can accelerate climate change, but the magnitude and timing of greenhouse gas emission from these regions and their impact on climate change remain uncertain. Here we find that current evidence suggests a gradual and prolonged release of greenhouse gas emissions in a warming climate and present a research strategy with which to target poorly understood aspects of permafrost carbon dynamics.

The full article is behind a pay wall so it's hard to say for sure.