Radiative absorption enhancement from coatings on black carbon aerosols

被引:98
作者
Cui, Xinjuan [1 ]
Wang, Xinfeng [1 ]
Yang, Lingxiao [1 ]
Chen, Bing [1 ]
Chen, Jianmin [1 ]
Andersson, August [2 ,3 ]
Gustafsson, Orjan [2 ,3 ]
机构
[1] Shandong Univ, Environm Res Inst, Sch Environm Sci & Engn, Jinan 250100, Peoples R China
[2] Stockholm Univ, Dept Environm Sci & Analyt Chem ACES, SE-10691 Stockholm, Sweden
[3] Stockholm Univ, Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden
基金
中国国家自然科学基金;
关键词
Black carbon; Aerosol mixing states; Lensing effect; Radiative absorption; China; OPTICAL-PROPERTIES; LIGHT-ABSORPTION; ORGANIC-CARBON; BROWN CARBON; MIXING STATE; ELEMENTAL CARBON; SOOT; ASIA; TEMPERATURE; MORPHOLOGY;
D O I
10.1016/j.scitotenv.2016.02.026
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The radiative absorption enhancement of ambient black carbon (BC), by light-refractive coatings of atmospheric aerosols, constitutes a large uncertainty in estimates of climate forcing. The direct measurements of radiative absorption enhancement require the experimentally-removing the coating materials in ambient BC-containing aerosols, which remains a challenge. Here, the absorption enhancement of the BC core by non-absorbing aerosol coatings was quantified using a two-step removal of both inorganic and organic matter coatings of ambient aerosols. The mass absorption cross-section (MAC) of decoated/pure atmospheric BC aerosols of 4.4 +/- 0.8 m(2)g(-1) was enhanced to 9.6 +/- 1.8 m(2)g(-1) at 678-nm wavelength for ambiently-coated BC aerosols at a rural Northern China site. The enhancement of MAC (E-MAC) rises from 1.4 +/- 0.3 in fresh combustion emissions to similar to 3 for aged ambient China aerosols. The three-week high-intensity campaign observed an average E-MAC of 2.25 +/- 0.55, and sulfates were primary drivers of the enhanced BC absorption. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:51 / 56
页数:6
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