Absorptivity of brown carbon in fresh and photo-chemically aged biomass-burning emissions

doi:10.5194/acp-13-7683-2013

GSTDTAP > 地球科学

DOI	10.5194/acp-13-7683-2013
	Absorptivity of brown carbon in fresh and photo-chemically aged biomass-burning emissions
	R. Saleh, C. J. Hennigan, G. R. McMeeking, W. K. Chuang, E. S. Robinson, H. Coe, N. M. Donahue, and A. L. Robinson
	2013-08-09
发表期刊	Atmospheric Chemistry and Physics
出版年	2013
英文摘要	Experiments were conducted to investigate light absorption of organic aerosol (OA) in fresh and photo-chemically aged biomass-burning emissions. The experiments considered residential hardwood fuel (oak) and fuels commonly consumed in wild-land and prescribed fires in the United States (pocosin pine and gallberry). Photo-chemical aging was performed in an environmental chamber. We constrained the effective light-absorption properties of the OA using conservative limiting assumptions, and found that both primary organic aerosol (POA) in the fresh emissions and secondary organic aerosol (SOA) produced by photo-chemical aging contain brown carbon, and absorb light to a significant extent. This work presents the first direct evidence that SOA produced in aged biomass-burning emissions is absorptive. For the investigated fuels, SOA is less absorptive than POA in the long visible, but exhibits stronger wavelength-dependence and is more absorptive in the short visible and near-UV. Light absorption by SOA in biomass-burning emissions might be an important contributor to the global radiative forcing budget.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/288033
专题	地球科学
推荐引用方式 GB/T 7714	R. Saleh, C. J. Hennigan, G. R. McMeeking, W. K. Chuang, E. S. Robinson, H. Coe, N. M. Donahue, and A. L. Robinson. Absorptivity of brown carbon in fresh and photo-chemically aged biomass-burning emissions[J]. Atmospheric Chemistry and Physics,2013.
APA	R. Saleh, C. J. Hennigan, G. R. McMeeking, W. K. Chuang, E. S. Robinson, H. Coe, N. M. Donahue, and A. L. Robinson.(2013).Absorptivity of brown carbon in fresh and photo-chemically aged biomass-burning emissions.Atmospheric Chemistry and Physics.
MLA	R. Saleh, C. J. Hennigan, G. R. McMeeking, W. K. Chuang, E. S. Robinson, H. Coe, N. M. Donahue, and A. L. Robinson."Absorptivity of brown carbon in fresh and photo-chemically aged biomass-burning emissions".Atmospheric Chemistry and Physics (2013).