This is really grim...
And unfortunately we have reached the tipping point where positive feedback is coming into play:
http://inhabitat.com/dramatic-disintegration-of-canada-permafrost-threatens-huge-carbon-release/
https://www.forbes.com/sites/trevornace/2017/02/28/siberias-doorway-underworld-rapidly-growing-size/#32b772ad6599
https://www.washingtonpost.com/news/energy-environment/wp/2016/11/30/the-ground-beneath-our-feet-is-poised-to-make-global-warming-much-worse-scientists-find/?utm_term=.7f7253a8d955