evidence: The Greenland ice sheet may be even more sensitive to the warming climate than scientists previously thought. [...] The study concludes that warming air temperatures have had a major hand in speeding up the losses from Greenland’s crumbling glaciers. If the atmosphere hadn’t warmed over the last few decades, the research finds, the retreat of Greenland’s glaciers as a whole likely would have been reduced by as much as a third. In northwestern Greenland, it could have been reduced by as much as half. "This unfortunately adds to the overwhelming body of evidence showing the sensitivity of the Greenland ice sheet to climate change, hence the need for urgent action to reduce greenhouse gas emissions," Slater said.