Abstract

Ice Sheets Climate is warming faster in the Arctic than in any other large region, and the Greenland Ice Sheet is melting faster as a result. Noel et al. project that the rate of summertime surface melting will surpass that of winter snow accumulation in Greenland when the average air temperature there rises to 4.5°C above preindustrial values, which corresponds to a global warming threshold of 2.7°C. Without strong CO2 emission mitigation measures, net surface mass loss could occur as soon as the middle of the 21st century. Geophys. Res. Lett. 10.1029/2020GL090471 (2021).

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