Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD029245 |
Changes in Aerosol Chemistry From 2014 to 2016 in Winter in Beijing: Insights From High-Resolution Aerosol Mass Spectrometry | |
Xu, Weiqi1,2; Sun, Yele1,2,3,4; Wang, Qingqing1; Zhao, Jian1,2; Wang, Junfeng5; Ge, Xinlei5; Xie, Conghui1,2; Zhou, Wei1,2; Du, Wei1,2; Li, Jie1; Fu, Pingqing1,6; Wang, Zifa1,2,4; Worsnop, Douglas R.7; Coe, Hugh8 | |
2019-01-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:2页码:1132-1147 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; England |
英文摘要 | Air quality has been continuously improved in recent years in Beijing, yet severe haze episodes still frequently occur in winter. Here we deployed an Aerodyne high-resolution aerosol mass spectrometer in two winter seasons during the same period to investigate the changes in aerosol chemistry from 2014 to 2016 in Beijing. Compared to 2014, submicron aerosol (PM1) species showed ubiquitous increases in mass concentrations by 10-130% in winter 2016, of which nitrate showed the largest increase among all aerosol species leading to a much higher NO3/SO4 ratio in 2016 (1.360.90) than 2014 (0.720.59). This result highlights an increasing role of nitrate in particulate matter pollution in recent years in Beijing. Aerosol composition and size distributions also changed significantly. Secondary inorganic species showed elevated contributions by similar to 10% in winter 2016 associated with corresponding decreases in organic aerosol (OA). Positive matrix factorization of OA illustrated the significant changes in both primary emissions and secondary production. While cooking OA decreased substantially from 25% in 2014 to 15% in 2016, the contribution of biomass burning OA slightly increased instead. Although secondary OA contributed similarly to OA in the two winters (49% vs. 53%), we observed ubiquitous increases (similar to 50%) in photochemically related oxygenated OA and oxidized primary OA, and oxygen-to-carbon ratios of OA, indicating the enhanced photochemical production in winter 2016. Aqueous-phase production of secondary OA however was relatively similar in the two winters. Further analysis demonstrated that the changes in aerosol and OA composition varied differently across different pollution and relative humidity levels. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000458845300038 |
WOS关键词 | POSITIVE MATRIX FACTORIZATION ; CHEMICAL SPECIATION MONITOR ; ORGANIC AEROSOL ; SUBMICRON AEROSOLS ; SEASONAL CHARACTERIZATION ; SOURCE APPORTIONMENT ; INORGANIC AEROSOLS ; CHINA INSIGHTS ; AQUEOUS-PHASE ; HAZE EVENTS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32906 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China; 3.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Jiangsu, Peoples R China; 4.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen, Peoples R China; 5.Nanjing Univ Informat Sci & Technol, Nanjing, Jiangsu, Peoples R China; 6.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, Peoples R China; 7.Aerodyne Res Inc, Billerica, MA USA; 8.Univ Manchester, Sch Earth & Environm Sci, Manchester, Lancs, England |
推荐引用方式 GB/T 7714 | Xu, Weiqi,Sun, Yele,Wang, Qingqing,et al. Changes in Aerosol Chemistry From 2014 to 2016 in Winter in Beijing: Insights From High-Resolution Aerosol Mass Spectrometry[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(2):1132-1147. |
APA | Xu, Weiqi.,Sun, Yele.,Wang, Qingqing.,Zhao, Jian.,Wang, Junfeng.,...&Coe, Hugh.(2019).Changes in Aerosol Chemistry From 2014 to 2016 in Winter in Beijing: Insights From High-Resolution Aerosol Mass Spectrometry.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(2),1132-1147. |
MLA | Xu, Weiqi,et al."Changes in Aerosol Chemistry From 2014 to 2016 in Winter in Beijing: Insights From High-Resolution Aerosol Mass Spectrometry".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.2(2019):1132-1147. |
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