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Greenland icesheet gets darker, ups risk of melting
Greenland\'s snowy surface has become darker over the past two decades due to high absorption of heat and a rise in snowmelt, finds a new study. The results showed that the trend is likely to continue, with the albedo, the ratio between reflected and incoming solar radiation, decreasing by as much as 10 per cent by the end of the century.Â
New York: Greenland's snowy surface has become darker over the past two decades due to high absorption of heat and a rise in snowmelt, finds a new study. The results showed that the trend is likely to continue, with the albedo, the ratio between reflected and incoming solar radiation, decreasing by as much as 10 per cent by the end of the century.
The scientists hypothesised that soot blowing in from wildfires in China, Siberia and North America might be the factor for the increase in the darkening of the ice sheets. The study revealed that the old sooty material locked below the surface of the ice sheet is the reason behind the darkening.
Overall, what matters is the total amount of solar energy that the surface absorbs. This is the real driver of melting, he said. A warm summer with clear sky and lots of solar radiation causes the surface to melt.
