气候变化领域集成服务门户(CCPortal): Black Carbon Involved Photochemistry Enhances the Formation of Sulfate in the Ambient Atmosphere: Evidence From In Situ Individual Particle Investigation

CCPortal

DOI	10.1029/2021JD035226
	Black Carbon Involved Photochemistry Enhances the Formation of Sulfate in the Ambient Atmosphere: Evidence From In Situ Individual Particle Investigation
	Zhang G.; Fu Y.; Peng X.; Sun W.; Shi Z.; Song W.; Hu W.; Chen D.; Lian X.; Li L.; Tang M.; Wang X.; Bi X.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:19
英文摘要	Mixing state of black carbon (BC) with secondary species has been highlighted as a major uncertainty in assessing its radiative forcing. While recent laboratory simulation has demonstrated that BC could serve as a catalyst to enhance the formation of sulfate, its role in the formation and evolution of secondary aerosols in the real atmosphere remains poorly understood. In the present study, the mixing of BC with sulfate/nitrate in the atmosphere of Guangzhou (China) was directly investigated with a single particle aerosol mass spectrometer (SPAMS). The peak area ratios of sulfate to nitrate (SNRs) for the BC-containing particles are constantly higher than those of the BC-free particles (defined as particles with negligible BC signals). Furthermore, the seasonal SNR peak is observed in summer and autumn, and the diurnal peak is found in the afternoon, consistent with the trends of radiation-related parameters (i.e., solar radiation and temperature), pointing to the BC-induced photochemical production of sulfate. Such hypothesis is further supported by the multilinear regression and random forest analysis, showing that the variation of SNRs associated with the BC-containing particles could be well explained (R2 = ∼0.7–0.8) by the radiation-related parameters (>30% of the variance) and the relative BC content (∼20%) in individual particles, but with limited influence of precursors (SO2/NOx: <5%). Differently, the radiation-related factors only explain <10% of the SNR variation for the BC-free particles. These results provide ambient observational evidence pointing to a unique role of BC on the photochemical formation and evolution of sulfate, which merits further quantitative evaluations. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	black carbon; individual particles; mixing state; SPAMS; sulfate
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236978
作者单位	State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (CAS), Guangzhou, China; CAS Center for Excellence in Deep Earth Science, Guangzhou, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, CAS, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangdong Environmental Monitoring Center, Guangzhou, China; Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou, China
推荐引用方式 GB/T 7714	Zhang G.,Fu Y.,Peng X.,et al. Black Carbon Involved Photochemistry Enhances the Formation of Sulfate in the Ambient Atmosphere: Evidence From In Situ Individual Particle Investigation[J],2021,126(19).
APA	Zhang G..,Fu Y..,Peng X..,Sun W..,Shi Z..,...&Bi X..(2021).Black Carbon Involved Photochemistry Enhances the Formation of Sulfate in the Ambient Atmosphere: Evidence From In Situ Individual Particle Investigation.Journal of Geophysical Research: Atmospheres,126(19).
MLA	Zhang G.,et al."Black Carbon Involved Photochemistry Enhances the Formation of Sulfate in the Ambient Atmosphere: Evidence From In Situ Individual Particle Investigation".Journal of Geophysical Research: Atmospheres 126.19(2021).