Sources of Particulate Matter in the Atmosphere

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Sources and appearance of atmospheric aerosols.
Top: local and large scale air pollution. Sources include (bottom, counterclockwise) volcanic eruptions (producing volcanic ash and sulphate), sea spray (sea salt and sulphate aerosols), desert storms (mineral dust), savannah biomass burning (BC and OC), coal power plants (fossil fuel BC and OC, sulphate, nitrate), ships (BC, OC, sulphates, nitrate), cooking* (domestic BC and OC), road transport (sulphate, BC, VOCs yielding OC). Center: Electron microscope images of (A) sulphates, (B) soot, (C) fly ash, a product of coal combustion (Posfai et al., 1999).
© 2013 Nature Education Images courtesy of Eyjafjallajökull eruption: courtesy of Árni Friðriksson, Wikimedia commons; Sea spray: NASA/JPL; Desert storm: Wikimedia commons; Savannah biomass burning: Wikimedia Commons ; Coal power plants: Wikimedia Commons; Ship in a Norwegian fjord: Stefan Großmann, Wikimedia commons; Cooking: Fullerton et al.2009; Truck: U. S. EPA, Wikimedia commons. All rights reserved.
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