A study looking at why clouds make the air near them glow more brightly suggests climate models may need to be revised.
Atmospheric scientists already account for the brighter air close to clouds, thanks to a 2007 study by Ilan Koren and his colleagues at the Weizmann Institute of Science in Rehovot, Israel. The team showed that cloud droplets, attached to dust and smoke particles, float in a halo kilometres wide around clouds, bouncing sunlight back out of the atmosphere. Seen from a satellite, that means air close to clouds looks brighter.
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