1. Source Attribution of Black Carbon in Arctic Snow.
- Author
-
HEGG, DEAN A., WARREN, STEPHEN G., GRENFELL, THOMAS C., DOHERTY, SARAH J., LARSON, TIMOTHY V., and CLARKE, ANTONY D.
- Subjects
- *
SNOW , *CARBON-black , *NONPOINT source pollution , *ATMOSPHERIC aerosols , *CHEMICAL speciation , *BIOMASS burning , *LIGHT absorption - Abstract
Snow samples obtained at 36 sites in Alaska, Canada, Greenland, Russia, and the Arctic Ocean in early 2007 were analyzed for light-absorbing aerosol concentration together with a suite of associated chemical species. The light absorption data, interpreted as black carbon concentrations, and other chemical data were input into the EPA PMF 1:1 receptor model to explore the sources for black carbon in the snow. The analysis found four factors or sources: two distinct biomass burning sources, a pollution source, and a marine source. The first three of these were responsible for essentially all of the black carbon, with the two biomass sources (encompassing both open and closed combustion) together accounting for >90% of the black carbon. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF