Passage: The release of carbon from permafrost regions constitutes one of the most significant uncertainties in current climate modeling. As Arctic temperatures rise at twice the global average, the once-permanently frozen ground begins to thaw, exposing ancient organic matter to microbial decomposition. This process releases carbon dioxide and methane, the latter of which possesses a global warming potential significantly higher than the former over a century-long horizon. While some researchers suggest that increased boreal forest growth in warmer latitudes may sequester a portion of this released carbon, empirical data indicates that the rate of permafrost emission likely outpaces any potential vegetative uptake. The resulting positive feedback loop—where warming triggers carbon release, which in turn accelerates further warming—represents a threshold in the Earth system that, once crossed, may be difficult to reverse through anthropogenic emissions reductions alone.