Vehicles and power generators in Antarctica produce black carbon pollution that settles on the snow, causing more of it to melt in the summer.
at the University of Santiago, Chile, and his colleagues decided to measure the impact of this black carbon pollution on the snow in Antarctica.
The researchers found there was an average of 3 nanograms of black carbon per gram of snow in the samples. This is up to four times higher than the levels in Antarctica’s more remote regions, says Cordero. The black carbon that settles on the snow can accelerate its melting. “When the snow becomes a bit darker, it absorbs extra solar radiation,” says Cordero. “That extra energy facilitates the melting of the snow.”In the areas where the black carbon concentrations are highest, the researchers found that the snow melts earlier than usual and decreases in thickness by an additional 23 millimetres each summer.
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