气候变化领域集成服务门户(CCPortal): Nitrate debuts as a dominant contributor to particulate pollution in Beijing: Roles of enhanced atmospheric oxidizing capacity and decreased sulfur dioxide emission

CCPortal

DOI	10.1016/j.atmosenv.2020.117995
	Nitrate debuts as a dominant contributor to particulate pollution in Beijing: Roles of enhanced atmospheric oxidizing capacity and decreased sulfur dioxide emission
	Feng T.; Bei N.; Zhao S.; Wu J.; Liu S.; Li X.; Liu L.; Wang R.; Zhang X.; Tie X.; Li G.
发表日期	2021
ISSN	13522310
卷号	244
英文摘要	Implementation of strict emission mitigation measures since 2013 has significantly changed air pollutants in the Beijing-Tianjin-Hebei region (BTH), China. Observations show that ozone (O3) concentrations have increased by 62.40% (27.84%) and SO2 concentrations have decreased by 56.42% (35.07%) during particulate pollution episodes in Beijing (BTH) in the autumn from 2013 to 2015. The measured nitrate concentration in Beijing has increased markedly, which to a large degree offsets the sulfate decrease caused by SO2 emission mitigation. Using the WRF-Chem model, we demonstrate that the enhanced nitrate formation is primarily attributed to increasing atmospheric oxidizing capacity (AOC) and decreasing sulfate competition for base ions. A 9.41–46.24% (7.58–40.97%) decrease in OH radical (O3) concentrations in October 2015 reduces nitrate and fine particulate matters (PM2.5) concentrations by 2.51–18.18% and 3.15–18.90% in Beijing, respectively. Based on the scenario in October 2015, if the SO2 emission increases by 20.00–100.00%, the PM2.5 concentration increases by 3.02–11.21%, but the nitrate level decreases by 2.48–21.87% simultaneously. Our results suggest that the nitrate aerosol has become a dominant contributor to particulate pollution in Beijing and that decreasing AOC is critical to mitigate nitrate and PM2.5 concentrations. © 2020 Elsevier Ltd
英文关键词	Atmospheric oxidizing capacity; Nitrate; Ozone; Sulfate; WRF-Chem
语种	英语
scopus关键词	Air pollution; Free radicals; Nitrates; Sulfur dioxide; Beijing-tianjin-hebei regions; Emission mitigation; Fine particulate matter; Nitrate concentration; Oxidizing capacity; Particulate pollution; PM2.5 concentration; Sulfur dioxide emissions; Particles (particulate matter); concentration (composition); emission; nitrate; oxidation; particulate matter; seasonal variation; spatiotemporal analysis; sulfur dioxide; 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/144803
作者单位	Department of Geography & Spatial Information Techniques, Ningbo University, Ningbo, Zhejiang 315211, China; Key Lab of Aerosol Chemistry and Physics, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710061, China; School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, Shaanxi 710061, China; Institute of East China Sea, Ningbo University, Ningbo, Zhejiang 315211, China
推荐引用方式 GB/T 7714	Feng T.,Bei N.,Zhao S.,et al. Nitrate debuts as a dominant contributor to particulate pollution in Beijing: Roles of enhanced atmospheric oxidizing capacity and decreased sulfur dioxide emission[J],2021,244.
APA	Feng T..,Bei N..,Zhao S..,Wu J..,Liu S..,...&Li G..(2021).Nitrate debuts as a dominant contributor to particulate pollution in Beijing: Roles of enhanced atmospheric oxidizing capacity and decreased sulfur dioxide emission.Atmospheric Environment,244.
MLA	Feng T.,et al."Nitrate debuts as a dominant contributor to particulate pollution in Beijing: Roles of enhanced atmospheric oxidizing capacity and decreased sulfur dioxide emission".Atmospheric Environment 244(2021).