Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-3493-2019 |
Daytime atmospheric oxidation capacity in four Chinese megacities during the photochemically polluted season: a case study based on box model simulation | |
Tan, Zhaofeng1,2; Lu, Keding1; Jiang, Meiqing1; Su, Rong1; Wang, Hongli3; Lou, Shengrong3; Fu, Qingyan4; Zhai, Chongzhi5; Tan, Qinwen6; Yue, Dingli7; Chen, Duohong7; Wang, Zhanshan8; Xie, Shaodong1; Zeng, Limin1; Zhang, Yuanhang1,9,10 | |
2019-03-20 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:6页码:3493-3513 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Germany |
英文摘要 | Atmospheric oxidation capacity is the basis for converting freshly emitted substances into secondary products and is dominated by reactions involving hydroxyl radicals (OH) during daytime. In this study, we present in situ measurements of ROx radical (hydroxy OH, hydroperoxy HO2, and organic peroxy RO2) precursors and products; the measurements are carried out in four Chinese megacities (Beijing, Shanghai, Guangzhou, and Chongqing) during photochemically polluted seasons. The atmospheric oxidation capacity is evaluated using an observation-based model and radical chemistry precursor measurements as input. The radical budget analysis illustrates the importance of HONO and HCHO photolysis, which account for similar to 50% of the total primary radical sources. The radical propagation is efficient due to abundant NO in urban environments. Hence, the production rate of secondary pollutants, that is, ozone (and fine-particle precursors (H2SO4, HNO3, and extremely low volatility organic compounds, ELVOCs) is rapid, resulting in secondary air pollution. The ozone budget demonstrates its high production in urban areas; also, its rapid transport to downwind areas results in rapid increase in local ozone concentrations. The O-3-NOx-VOC (volatile organic compound) sensitivity tests show that ozone production is VOC-limited and that alkenes and aromatics should be mitigated first for ozone pollution control in the four studied megacities. In contrast, NOx emission control (that is, a decrease in NOx) leads to more severe ozone pollution. With respect to fine-particle pollution, the role of the HNO3-NO3 partitioning system is investigated using a thermal dynamic model (ISORROPIA 2). Under high relative humidity (RH) and ammonia-rich conditions, nitric acid converts into nitrates. This study highlights the efficient radical chemistry that maintains the atmospheric oxidation capacity in Chinese megacities and results in secondary pollution characterized by ozone and fine particles. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461782400002 |
WOS关键词 | PEARL RIVER-DELTA ; HETEROGENEOUS N2O5 UPTAKE ; NITROUS-ACID HONO ; MISSING OH SOURCE ; OZONE PRODUCTION ; HO2 CONCENTRATIONS ; RADICAL CHEMISTRY ; BOUNDARY-LAYER ; AIR-POLLUTION ; MEXICO-CITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/25008 |
专题 | 地球科学 |
作者单位 | 1.Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100871, Peoples R China; 2.Forschungszentrum Julich, IEK 8 Troposphere, Inst Energy & Climate Res, Julich, Germany; 3.Shanghai Acad Environm Sci, State Environm Protect Key Lab Format & Prevent U, Shanghai 200233, Peoples R China; 4.Shanghai Environm Monitoring Ctr, Shanghai 200235, Peoples R China; 5.Ecol & Environm Monitoring Ctr Chongqing, Chongqing 401147, Peoples R China; 6.Chengdu Acad Environm Sci, Chengdu 610072, Sichuan, Peoples R China; 7.Guangdong Environm Monitoring Ctr, State Environm Protect Key Lab Reg Air Qual Monit, Guangzhou 510308, Guangdong, Peoples R China; 8.Beijing Municipal Environm Monitoring Ctr, Beijing Key Lab Atmospher Particulate Monitoring, Beijing 100048, Peoples R China; 9.Peking Univ, Beijing Innovat Ctr Engn Sci & Adv Technol, Beijing 100871, Peoples R China; 10.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China |
推荐引用方式 GB/T 7714 | Tan, Zhaofeng,Lu, Keding,Jiang, Meiqing,et al. Daytime atmospheric oxidation capacity in four Chinese megacities during the photochemically polluted season: a case study based on box model simulation[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(6):3493-3513. |
APA | Tan, Zhaofeng.,Lu, Keding.,Jiang, Meiqing.,Su, Rong.,Wang, Hongli.,...&Zhang, Yuanhang.(2019).Daytime atmospheric oxidation capacity in four Chinese megacities during the photochemically polluted season: a case study based on box model simulation.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(6),3493-3513. |
MLA | Tan, Zhaofeng,et al."Daytime atmospheric oxidation capacity in four Chinese megacities during the photochemically polluted season: a case study based on box model simulation".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.6(2019):3493-3513. |
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