Cryosphere Faces Permanent Damage When World Overshoots 1.5C, Scientists Warn

A UN-backed report warns that even temporarily overshooting the Paris agreement's 1.5C warming target could cause permanent and widespread losses of glaciers, snow and polar ice sheets. With Greenland and Antarctic ice sheets already melting about six times faster than in the 1990s, the report argues that global temperatures should ultimately be brought back below 1C. The Guardian reports: The report, which comes as world leaders and diplomats converge on Turkey for the 31st annual Cop climate conference, documented rapid and accelerating melting of the cryosphere and polar oceans, with damages that range from the loss of the Greenland and Antarctic ice sheets, driving sea level rises that threaten hundreds of millions of people, to thawing permafrost, which releases more planet-heating gas. Glaciers, which are still responding to historical warming, would only preserve about 70% of their current volume over a timescale of centuries if long-term heating were brought back down to 0.8C, the report found. Meanwhile, the ice sheets covering Greenland and Antarctica, which are melting about six times faster today than in the 1990s, would continue to lose ice even in scenarios where over