|Scooped by Brett Klinkner|
This article explains the cause of some recently observed, significant outliers to sea level rise contributions. Across the summer of 2012, spanning nearly the entire Greenland ice sheet, there was a “historically rare period of extended surface melting.” This was found to be largely due to low-level “liquid clouds,” which increased near-surface temperatures by through their radiative effects. These clouds were thick enough and low enough to enhance infrared flux near the surface but also thin enough to allow “sufficient” solar radiation to pass through and raise surface temps above the melting point. These clouds are not uncommon over Greenland and across the Arctic, which makes these findings even more valuable, assisting the difficulties that global climate models have displayed which likely led from underestimation of these thin liquid clouds.
Benartz, R. "July 2012 Greenland Melt Extent Enhanced by Low-level Liquid Clouds." Nature: International Weekly Journal Of Science. N.p., 3 Apr. 2013. Web. 22 June 2014. <http%3A%2F%2Fwww.nature.com%2Fnature%2Fjournal%2Fv496%2Fn7443%2Ffull%2Fnature12002.html>.