000009001 001__ 9001
000009001 041__ $$aEnglish
000009001 100__ $$aGustafsson, O.
000009001 245__ $$aBrown clouds over south asia: Biomass or fossil fuel combustion?
000009001 260__ $$c2009
000009001 300__ $$a495-8
000009001 520__ $$aCarbonaceous aerosols cause strong atmospheric heating and large surface cooling that is as important to South Asian climate forcing as greenhouse gases, yet the aerosol sources are poorly understood. Emission inventory models suggest that biofuel burning accounts for 50 to 90% of emissions, whereas the elemental composition of ambient aerosols points to fossil fuel combustion. We used radiocarbon measurements of winter monsoon aerosols from western India and the Indian Ocean to determine that biomass combustion produced two-thirds of the bulk carbonaceous aerosols, as well as one-half and two-thirds of two black carbon subfractions, respectively. These constraints show that both biomass combustion (such as residential cooking and agricultural burning) and fossil fuel combustion should be targeted to mitigate climate effects and improve air quality.
000009001 650__ $$aClimate change
000009001 650__ $$aBlack carbon
000009001 650__ $$aAtmospheric pollution
000009001 700__ $$aKrusa, M.
000009001 700__ $$aZencak, Z.
000009001 700__ $$aSheesley, R. J.
000009001 700__ $$aGranat, L.
000009001 700__ $$aEngstrom, E.
000009001 700__ $$aPraveen, P. S.
000009001 700__ $$aRao, P. S.
000009001 700__ $$aLeck, C.
000009001 700__ $$aRodhe, H.
000009001 773__ $$pScience 323 (5913)
000009001 773__ $$a10.1126/science.1164857
000009001 8564_ $$uhttp://www.ncbi.nlm.nih.gov/pubmed/19164746$$yExternal link
000009001 8564_ $$uhttp://lib.icimod.org/record/9001/files/9001.pdf
000009001 8564_ $$uhttp://lib.icimod.org/record/9001/files/9001.ps.gz
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000009001 980__ $$aARTICLE