Multi-wavelength light absorption of black and brown carbon at a high-altitude site on the Southeastern margin of the Tibetan Plateau, China

doi:10.1016/j.atmosenv.2019.05.035

IEECAS OpenIR > 粉尘与环境研究室

	Multi-wavelength light absorption of black and brown carbon at a high-altitude site on the Southeastern margin of the Tibetan Plateau, China
	Zhao, Zhuzi 1,2; Cao, Junji 2,3; Chow, Judith C.6; Watson, John G.6; Chen, Antony L-W 5; Wang, Xiaoliang 6; Wang, Qiyuan 2; Tian, Jie 2; Shen, Zhenxing 4; Zhu, Chongshu 2; Liu, Suixin 2; Tao, Jun 7; Ye, Zhaolian 1; Zhang, Ting 2; Zhou, Jiamao 2; Tian, Ruixia 2
通讯作者	Cao, Junji(cao@loess.llqg.ac.cn)
	2019-09-01
发表期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
卷号	212 页码:54-64
摘要	The Tibetan Plateau (TP) is one of the world's most sensitive areas for climate change, but the lack of information on light-absorption by aerosols limits the understanding of climate forcing feedbacks. Here, the contributions of black carbon (BC) and brown carbon (BrC) to light absorption and radiative forcing were investigated. Absorption Angstrom exponents (alpha), mass absorption cross sections (MAC), and absorption coefficients (b(abs)) for selected wavelengths were measured for a year of aerosol samples collected at Lulang on the southeast TP. Aerosol absorption at all wavelengths was strongest in the pre-monsoon when levoglucosan, a biomass burning indicator, was elevated. The contributions of BC, BrC, and dust to b(abs) were decoupled. Results showed that dust contributed 8.5% to the total light absorption at 405 nm and 3.9% 808 nm. A two-component model indicated that BC and BrC contributed 48.7% and 44.0% to total b(abs) at 405 nm but BrC had a smaller effect at middle visible wavelengths. Elevated b(abs,non-dust,BC) and b(abs,non-dust,BrC) and a high alpha(BrC) but low alpha(aerosol) values in the pre-monsoon were attributed to biomass burning, which produces not only BrC but also BC which has a much lower a value. Average non-dust MACs for BC and BrC at 405 nm were 6.1 +/- 2.8 and 0.72 +/- 0.55 m(2) g(-1), respectively. Nonparametric statistical tests showed that the MAC(non-dustBC) was relatively constant but MAC(non-dust, BrC) was more variable. In addition, BrC was correlated with non-dust b(abs,BC) and MAC(non-dust,BC) in winter and the pre-monsoon, implying BrC and BC shared sources in those two seasons, but lower correlations in the monsoon and post-monsoon suggest that a mixture of sources impacted BrC (e.g., biogenic emission, secondary formation, etc.). Finally, the relative contributions of BrC to BC for radiative forcing from 405 to 808 nm were 29.4 +/- 9.5% with no remarkable seasonal differences, confirming the importance of BrC to light absorption in the near UV throughout the year. As a result, the BrC absorption is an important additional factor which needs to be considered in atmospheric models, although the atmospheric heating by BC seems to be a larger climate forcer in this region.
关键词	Aerosol light absorption Dust Black carbon brown carbon Climate Tibetan plateau
DOI	10.1016/j.atmosenv.2019.05.035
关键词[WOS]	POLYCYCLIC AROMATIC-HYDROCARBONS ; FOSSIL-FUEL ; SOURCE APPORTIONMENT ; OPTICAL-PROPERTIES ; ORGANIC AEROSOL ; REMOTE SITE ; BIOMASS ; AETHALOMETER ; INSTRUMENT ; PM2.5
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41603129] ; National Natural Science Foundation of China[21661132005] ; National Natural Science Foundation of China[41877391] ; West Light Foundation of The Chinese Academy of Sciences[XAB2015B02] ; Youth Innovation Promotion Association CAS
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
项目资助者	National Natural Science Foundation of China ; West Light Foundation of The Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000474323500007
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：38[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13740
专题	粉尘与环境研究室
通讯作者	Cao, Junji
作者单位	1.Jiangsu Univ Technol, Sch Chem & Environm Engn, Changzhou, Jiangsu, Peoples R China 2.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian, Shaanxi, Peoples R China 3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Shaanxi, Peoples R China 4.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian, Shaanxi, Peoples R China 5.Univ Nevada, Dept Environm & Occupat Hlth, Las Vegas, NV 89154 USA 6.Desert Res Inst, Div Atmospher Sci, Reno, NV USA 7.Minist Environm Protect, South China Inst Environm Sci, Guangzhou, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Zhuzi,Cao, Junji,Chow, Judith C.,et al. Multi-wavelength light absorption of black and brown carbon at a high-altitude site on the Southeastern margin of the Tibetan Plateau, China[J]. ATMOSPHERIC ENVIRONMENT,2019,212:54-64.
APA	Zhao, Zhuzi.,Cao, Junji.,Chow, Judith C..,Watson, John G..,Chen, Antony L-W.,...&Tian, Ruixia.(2019).Multi-wavelength light absorption of black and brown carbon at a high-altitude site on the Southeastern margin of the Tibetan Plateau, China.ATMOSPHERIC ENVIRONMENT,212,54-64.
MLA	Zhao, Zhuzi,et al."Multi-wavelength light absorption of black and brown carbon at a high-altitude site on the Southeastern margin of the Tibetan Plateau, China".ATMOSPHERIC ENVIRONMENT 212(2019):54-64.