The latest, from a blog called Arctic News , warns that by 2026 — that’s just nine years from now — warming above the Arctic Circle could be so extreme that a massively disrupted and weakened jet stream could lead to global temperature rises so severe that a massive extinction event, including humans, could result. This latest blog post, written by Arctic News editor Sam Carana, draws on research by a number of scientists , who report on various feedback loops that will result from a dramatically warmer north polar region.