气候变化领域集成服务门户(CCPortal): Source apportionment of water-soluble brown carbon in aerosols over the northern South China Sea: Influence from land outflow, SOA formation and marine emission

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DOI	10.1016/j.atmosenv.2020.117484
	Source apportionment of water-soluble brown carbon in aerosols over the northern South China Sea: Influence from land outflow, SOA formation and marine emission
	Geng X.; Mo Y.; Li J.; Zhong G.; Tang J.; Jiang H.; Ding X.; Malik R.N.; Zhang G.
发表日期	2020
ISSN	1352-2310
卷号	229
英文摘要	Water-soluble brown carbon (BrC) plays an important role in climate change by influencing aerosol radiative forcing. There is little information on aerosol BrC over the South China Sea (SCS). In this study, water-soluble organic carbon (WSOC) in a round-year set of aerosol samples from a remote island in the northern SCS were characterized for optical properties. In-depth information about the sources and input pathways of water-soluble BrC was obtained using molecular markers and statistic tools. The highest WSOC concentrations, light absorption coefficients at 365 nm (Abs365) and mass absorption efficiencies at 365 nm (MAE365) were observed in winter when atmospheric outflow from mainland China and the northern Indo-China Peninsula prevailed. Through the year, primary emissions from biomass burning and urban secondary organic aerosols (SOA) & waste combustion, respectively, were observed to be associated with higher MAE365 (2.47 ± 0.40 m2 g−1 and 1.97 ± 0.22 m2 g−1) and to be the main contributors to Abs365 (22.0 ± 3.6% and 31.6 ± 3.6%), while biogenic SOA showed little contribution. For the first time, microorganism/plankton primary emissions, mainly from the sea, was identified to be an important contributor to water-soluble BrC (13.6 ± 4.2% of Abs365, MAE365: 0.98 ± 0.30 m2 g−1), especially in spring (31% of Abs365). This implies that emissions from microorganism/plankton warrants careful consideration in the assessment of global aerosol light absorbance. © 2020 Elsevier Ltd
英文关键词	Atmospheric outflow; Light absorption properties; Molecular markers; Source apportionment; Water-soluble brown carbon
语种	英语
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129535
作者单位	State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Quaid-i-Azam University45320, Pakistan
推荐引用方式 GB/T 7714	Geng X.,Mo Y.,Li J.,et al. Source apportionment of water-soluble brown carbon in aerosols over the northern South China Sea: Influence from land outflow, SOA formation and marine emission[J],2020,229.
APA	Geng X..,Mo Y..,Li J..,Zhong G..,Tang J..,...&Zhang G..(2020).Source apportionment of water-soluble brown carbon in aerosols over the northern South China Sea: Influence from land outflow, SOA formation and marine emission.Atmospheric Environment,229.
MLA	Geng X.,et al."Source apportionment of water-soluble brown carbon in aerosols over the northern South China Sea: Influence from land outflow, SOA formation and marine emission".Atmospheric Environment 229(2020).