DOI: 10.1002/2015JD023697
论文题名: Contribution of brown carbon and lensing to the direct radiative effect of carbonaceous aerosols from biomass and biofuel burning emissions
作者: Saleh R. ; Marks M. ; Heo J. ; Adams P.J. ; Donahue N.M. ; Robinson A.L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2015
卷: 120, 期: 19 起始页码: 10285
结束页码: 10296
语种: 英语
英文关键词: biomass burning
; black carbon
; brown carbon
; carbonaceous aerosols
; mixing state
; radiative effect
Scopus关键词: aerosol
; biofuel
; biomass burning
; black carbon
; brown carbon
; emission inventory
; mixing ratio
; parameterization
; radiative transfer
; sensitivity analysis
英文摘要: We present global direct radiative effect (DRE) calculations of carbonaceous aerosols emitted from biomass/biofuel burning addressing the interplay between two poorly constrained contributions to DRE: mixing state of black carbon (lensing) and light absorption by organic aerosol (OA) due to the presence of brown carbon (BrC). We use the parameterization of Saleh et al. (2014) which captures the variability in biomass/biofuel OA absorption. The global mean effect of OA absorption is +0.22 W/m2 and +0.12 W/m2 for externally and internally mixed cases, while the effect of lensing is +0.39 W/m2 and +0.29 W/m2 for nonabsorbing and absorbing OA cases, signifying the nonlinear interplay between OA absorption and lensing. These two effects can be overestimated if not treated simultaneously in radiative transfer calculations. The combined effect of OA absorption and lensing increases the global mean DRE of biomass/biofuel aerosols from -0.46 W/m2 to +0.05 W/m2 and appears to reduce the gap between existing model-based and observationally constrained DRE estimates. We observed a strong sensitivity to these parameters in key regions, where DRE shifts from strongly negative (< -1 W/m2) to strongly positive (> +1 W/m2) when accounting for lensing and OA absorption. ©2015. American Geophysical Union. All Rights Reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62997
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, United States
Recommended Citation:
Saleh R.,Marks M.,Heo J.,et al. Contribution of brown carbon and lensing to the direct radiative effect of carbonaceous aerosols from biomass and biofuel burning emissions[J]. Journal of Geophysical Research: Atmospheres,2015-01-01,120(19)