Black carbon

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Not to be confused with Carbon black. For the cell phone, see Samsung SGH-D900

thumb|Black carbon is in the air and circulates the globe.thumb|Black carbon travels along

Climatology, black carbon or BC is a climate forcing agent formed through the incomplete combustion of fossil fuels, biofuel, and biomass, and is emitted in both anthropogenic and naturally occurring soot. It consists of pure carbon in several linked forms. Black carbon warms the Earth by absorbing heat in the atmosphere and by reducing albedo, the ability to reflect sunlight, when deposited on snow and ice. Black carbon stays in the atmosphere for only several days to weeks, whereas CO<sub>2</sub> has an atmospheric lifetime of more than 100 years.V. Ramanathan and G. Carmichael, Global and regional climate changes due to black carbon, 1 NATURE GEOSCIENCE 221-22 (23 March 2008) (“The BC forcing of 0.9 W m–2 (with a range of 0.4 to 1.2 W m–2) … is as much as 55% of the CO<sub>2</sub> forcing and is larger than the forcing due to the other GHGs such as CH<sub>4</sub>, CFCs, N<sub>2</sub>O or tropospheric ozone.”) The term black carbon is also used in soil sciences and geology, referring either to deposited atmospheric BC or to directly incorporated BC from vegetation fires.Schmidt,......
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