气候变化领域集成服务门户(CCPortal): Secondary organic aerosol enhanced by increasing atmospheric oxidizing capacity in Beijing-Tianjin-Hebei (BTH); China

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DOI	10.5194/acp-19-7429-2019
	Secondary organic aerosol enhanced by increasing atmospheric oxidizing capacity in Beijing-Tianjin-Hebei (BTH); China
	Feng T.; Zhao S.; Bei N.; Wu J.; Liu S.; Li X.; Liu L.; Qian Y.; Yang Q.; Wang Y.; Zhou W.; Cao J.; Li G.
发表日期	2019
ISSN	16807316
起始页码	7429
结束页码	7443
卷号	19 期号:11
英文摘要	The implementation of the Air Pollution Prevention and Control Action Plan in China since 2013 has profoundly altered the ambient pollutants in the Beijing-Tianjin-Hebei (BTH) region. Here we show observations of substantially increased O3 concentrations (about 30 %) and a remarkable increase in the ratio of organic carbon (OC) to elemental carbon (EC) in BTH during the autumn from 2013 to 2015, revealing an enhancement in atmospheric oxidizing capacity (AOC) and secondary organic aerosol (SOA) formation. To explore the impacts of increasing AOC on the SOA formation, a severe air pollution episode from 3 to 8 October 2015 with high O3 and PM2:5 concentrations is simulated using the WRF-Chem model. The model performs reasonably well in simulating the spatial distributions of PM2:5 and O3 concentrations over BTH and the temporal variations in PM2:5, O3, NO2, OC, and EC concentrations in Beijing compared to measurements. Sensitivity studies show that the change in AOC substantially influences the SOA formation in BTH. A sensitivity case characterized by a 31 % O3 decrease (or 36 % OH decrease) reduces the SOA level by about 30 % and the SOA fraction in total organic aerosol by 17 % (from 0.52 to 0.43, dimensionless). Spatially, the SOA decrease caused by reduced AOC is ubiquitous in BTH, but the spatial relationship between SOA concentrations and the AOC is dependent on the SOA precursor distribution. Studies on SOA formation pathways further show that when the AOC is reduced, the SOA from oxidation and partitioning of semivolatile primary organic aerosol (POA) and coemitted intermediate volatile organic compounds (IVOCs) decreases remarkably, followed by those from anthropogenic and biogenic volatile organic compounds (VOCs). Meanwhile, the SOA decrease in the irreversible uptake of glyoxal and methylglyoxal on the aerosol surfaces is negligible. © 2019 Author(s).
语种	英语
scopus关键词	aerosol composition; anthropogenic source; atmospheric pollution; concentration (composition); formation mechanism; organic carbon; oxidation; ozone; volatile organic compound; China; Jingjinji
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/144358
作者单位	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo, China; Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, China; Xi'an Accelerator Mass Spectrometry Center, Xi'an, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China
推荐引用方式 GB/T 7714	Feng T.,Zhao S.,Bei N.,et al. Secondary organic aerosol enhanced by increasing atmospheric oxidizing capacity in Beijing-Tianjin-Hebei (BTH); China[J],2019,19(11).
APA	Feng T..,Zhao S..,Bei N..,Wu J..,Liu S..,...&Li G..(2019).Secondary organic aerosol enhanced by increasing atmospheric oxidizing capacity in Beijing-Tianjin-Hebei (BTH); China.Atmospheric Chemistry and Physics,19(11).
MLA	Feng T.,et al."Secondary organic aerosol enhanced by increasing atmospheric oxidizing capacity in Beijing-Tianjin-Hebei (BTH); China".Atmospheric Chemistry and Physics 19.11(2019).