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DOI	10.5194/acp-22-7619-2022
	The chemical composition and mixing state of BC-containing particles and the implications on light absorption enhancement
	Sun, Jiaxing; Sun, Yele; Xie, Conghui; Xu, Weiqi; Chen, Chun; Wang, Zhe; Li, Lei; Du, Xubing; Huang, Fugui; Li, Yan; Li, Zhijie; Pan, Xiaole; Ma, Nan; Xu, Wanyun; Fu, Pingqing; Wang, Zifa
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	7619
结束页码	7630
卷号	22 期号:11 页码:12
英文摘要	The radiative forcing of black carbon (BC) depends strongly on its mixing state in different chemical environments. Here we analyzed the chemical composition and mixing state of BC-containing particles by using a single-particle aerosol mass spectrometer and investigated their impact on light absorption enhancement (E-abs) at an urban (Beijing) and a rural site (Gucheng) in the North China Plain. While the BC was dominantly mixed with organic carbon (OC), nitrate, and sulfate at both the urban and rural sites, the rural site showed a much higher fraction of BC coated with OC and nitrate (36 % vs. 15 %-20 %). Moreover, the BC mixing state evolved significantly as a function of relative humidity (RH), with largely increased coatings of OC-nitrate and nitrate at high RH levels. By linking with an organic aerosol (OA) composition, we found that the OC coated on BC comprised dominantly secondary OA in Beijing, while primary and secondary OA were similarly important in Gucheng. Furthermore, E-abs was highly dependent on secondary inorganic aerosol coated on BC at both sites, while the coated primary OC also resulted in an E-abs of similar to 1.2 for relatively fresh BC particles at the rural site. A positive matrix factorization analysis was performed to quantify the impact of different mixing states on E-abs. Our results showed a small E-abs (1.06-1.11) for BC particles from fresh primary emissions, while the E-abs increased significantly above 1.3 when BC was aged rapidly with increased coatings of OC-nitrate or nitrate; it can reach above 1.4 as sulfate was involved in BC aging.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000810102500001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273399
作者单位	Chinese Academy of Sciences; Institute of Atmospheric Physics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Institute of Urban Environment, CAS; Jinan University; Jinan University; Chinese Academy of Meteorological Sciences (CAMS); Chinese Academy of Sciences; Chinese Academy of Meteorological Sciences (CAMS); Tianjin University; Peking University
推荐引用方式 GB/T 7714	Sun, Jiaxing,Sun, Yele,Xie, Conghui,et al. The chemical composition and mixing state of BC-containing particles and the implications on light absorption enhancement[J],2022,22(11):12.
APA	Sun, Jiaxing.,Sun, Yele.,Xie, Conghui.,Xu, Weiqi.,Chen, Chun.,...&Wang, Zifa.(2022).The chemical composition and mixing state of BC-containing particles and the implications on light absorption enhancement.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(11),12.
MLA	Sun, Jiaxing,et al."The chemical composition and mixing state of BC-containing particles and the implications on light absorption enhancement".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.11(2022):12.