气候变化领域集成服务门户(CCPortal): Nitrate and secondary organic aerosol dominated particle light extinction in Beijing due to clean air action

CCPortal

DOI	10.1016/j.atmosenv.2021.118833
	Nitrate and secondary organic aerosol dominated particle light extinction in Beijing due to clean air action
	Li Z.; Sun Y.; Wang Q.; Xin J.; Sun J.; Lei L.; Li J.; Fu P.; Wang Z.
发表日期	2022
ISSN	1352-2310
卷号	269
英文摘要	Air quality in China has been continuously improved since clean air action in 2013, yet the visibility was not improved simultaneously. Here we employed a new method by integrating highly time-resolved aerosol compositions with particle light extinction (bext) into positive matrix factorization to quantify the different contributors to visibility degradation during four seasons in Beijing. Our results show that ammonium nitrate-related factor contributed dominantly to bext during all seasons (31–48%) and played more significant roles during low-visibility periods. Secondary organic aerosol (SOA) was an important contributor of bext (27–35%) in autumn and spring while primary OA related sources were more important in winter (37%). An increase in aerosol mass extinction efficiency and similarly important roles of ammonium nitrate and SOA in visibility degradation were also observed during the COVID-19 lockdown period. Our results point towards a future challenge in improving visibility in China due to the increased contributions of nitrate and SOA in PM2.5. Future emission controls with a priority to decrease nitrate would benefit both air quality and visibility. © 2021 Elsevier Ltd
关键词	Beijing COVID-19 Mass extinction efficiency Nitrate Secondary organic aerosol Visibility
语种	英语
scopus关键词	Aerosols; Air quality; Efficiency; Factorization; Light extinction; Visibility; Aerosol composition; Beijing; Clean air; COVID-19; Mass extinction efficiency; Organic aerosol; Positive Matrix Factorization; Secondary organic aerosol; Time-resolved; Visibility degradation; Nitrates; ammonium nitrate; nitrate; aerosol composition; ammonium nitrate; COVID-19; light effect; particulate matter; photodegradation; air pollution control; air quality; Article; autumn; chemical composition; China; circadian rhythm; coronavirus disease 2019; degradation; lockdown; mass extinction; particle size; seasonal variation; secondary organic aerosol; signal noise ratio; spring; summer; visibility; winter; Beijing [China]; China
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/248129
作者单位	State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China
推荐引用方式 GB/T 7714	Li Z.,Sun Y.,Wang Q.,et al. Nitrate and secondary organic aerosol dominated particle light extinction in Beijing due to clean air action[J],2022,269.
APA	Li Z..,Sun Y..,Wang Q..,Xin J..,Sun J..,...&Wang Z..(2022).Nitrate and secondary organic aerosol dominated particle light extinction in Beijing due to clean air action.ATMOSPHERIC ENVIRONMENT,269.
MLA	Li Z.,et al."Nitrate and secondary organic aerosol dominated particle light extinction in Beijing due to clean air action".ATMOSPHERIC ENVIRONMENT 269(2022).