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DOI10.1016/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.
Date Issued2022
ISSN1352-2310
Volume269
Other AbstractAir 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
KeywordBeijingCOVID-19Mass extinction efficiencyNitrateSecondary organic aerosolVisibility
Language英语
scopus keywordsAerosols; 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
journalATMOSPHERIC ENVIRONMENT
Document Type期刊论文
Identifierhttp://gcip.llas.ac.cn/handle/2XKMVOVA/248129
AffiliationState 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
Recommended Citation
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).
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