Black Carbon Aerosols Cause Global Dimming But Overall Warming
3,963 views · Published 13 March 2017 · 14:57 · Indexed 4 November 2026
Channel: Paul Beckwith · 2017 · News & Politics
Aerosols are small particles or droplets (non-water) in the atmosphere that punch above their weight. The sulphur dioxide type reflect sunlight, shielding the surface (global dimming) and thus causing cooling. The soot (black carbon) type absorb sunlight and thus heat up the atmosphere more than they shield the surface, and thus cause global warming. The net effect thus depends on the aerosol composition/mix. Both types change the physical structure/reflectivity/longevity of clouds, complicating the story.
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