Where Arctic sea ice breaks into open water, the sea and ice release gases. Sunlight turns those gases into brand-new particles in the air above.
Some of the particles grow big enough to seed a cloud droplet. Near the ice edge west of Greenland, their number climbed from about 50 in every cubic centimeter of air to roughly 1,500 over two days.
Arctic air is unusually clean. Almost no dust or industrial soot reaches that far north in summer, so water vapor there has very…
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Source www.earth.com
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