Observation-Based Modeling of O3–Precursor Relationships in Nanjing, China
DOI:
https://doi.org/10.12974/2311-8741.2020.08.9Keywords:
O3 pollution, OBM, OFP, RIR.Abstract
Surface ozone (O3) is formed through a series of photochemical reactions of nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the atmosphere. In recent years, ozone concentrations in Nanjing have been increasing. To effectively mitigate ozone pollution, it is essential to understand the relationship between O3 and its precursors. In this study, the observation-based model (OBM) coupled with the Master Chemical Mechanism (MCM), was applied to investigate the O3-NOx-VOCs relationship in the Nanjing Metropolitan Area of China in summer 2015. The OBM model well reproduces the levels and diurnal variations of O3 with a high index of agreement value. Analysis of ozone formation potential (OFP) indicates that although observed alkanes are the most abundant VOCs (46.8%), their contributions to OFP are relatively small due to lower maximum incremental reactivity (MIR). Aromatics contribute the most to OFP (61.6%), followed by alkenes (18%). These two groups dominate in the top ten VOCs of OFP. In particular, m/p-Xylene shows a significant contribution to OFP with the highest OFP value over 30 µg/m3. The relative incremental reactivity (RIR) results demonstrate that the reduction of anthropogenic VOCs (AVOCs) is the most efficient way to mitigate local O3 pollution in Nanjing. Specifically, m/p-Xylene emissions should be reduced at it shows the highest RIR among all the AVOCs. Based on the results of OBM, a cutting ratio of AVOCs to NOx of more than 0.46 is proposed to implement efficient control measurements in Nanjing for the study period.
References
Brauer M and Brook JR. Ozone personal exposures and health effects for selected groups residing in the Fraser Valley. Atmos Environ 1997; 31(14): 2113-2121. https://doi.org/10.1016/S1352-2310(96)00129-X
Yang C, Yang H, Guo S, Wang Z, Xu X, Duan X, et al. Alternative ozone metrics and daily mortality in Suzhou: The China Air Pollution and Health Effects Study (CAPES). Sci Total Environ 2012; 426: 83-9. https://doi.org/10.1016/j.scitotenv.2012.03.036
Sitch S, Cox P, Collins W, Huntingford C, Sitch S, Cox PM, et al. Indirect radiative forcing of climate change through ozone effects on the land-carbon sink. Nature 2007; 448: 791-794. https://doi.org/10.1038/nature06059
Unger N, Shindell D, Koch D, Streets D. Cross influences of ozone and sulfate precursor emissions changes on air quality and climate. Proc Natl Acad Sci U S A 2006; 103: 4377-80. https://doi.org/10.1073/pnas.0508769103
Zhang Z, Zhang X, Gong D, Quan W, Zhao X, Ma Z, et al. Evolution of surface O3 and PM2.5 concentrations and their relationships with meteorological conditions over the last decade in Beijing. Atmos Environ 2015; 108: 67-75. https://doi.org/10.1016/j.atmosenv.2015.02.071
Ma Z, Liu R, Liu Y, Bi J. Effects of air pollution control policies on PM2.5 pollution improvement in China from 2005 to 2017: A satellite-based perspective. Atmos. Chem. Phys 2019; 19: 6861-6877. https://doi.org/10.5194/acp-19-6861-2019
Lu X, Hong J, Zhang L, Cooper O, Schultz M, Xu X, et al. Severe Surface Ozone Pollution in China: A Global Perspective. Environ Sci Technol 2018; 5: 487-494. https://doi.org/10.1021/acs.estlett.8b00366
Li G, Bei N, Cao J, Wu J, Long X, Feng T, et al. Widespread and persistent ozone pollution in eastern China during the non-winter season of 2015: Observations and source attributions. Atmos. Chem. Phys 2017; 17: 2759-2774. https://doi.org/10.5194/acp-17-2759-2017
Xue L, Wang T, Gao J, Ding A, Zhou X, Blake DR, et al. Ground-level ozone in four Chinese cities: precursors, regional transport and heterogeneous processes. Atmos. Chem. Phys 2014; 14(23): 13175-13188. https://doi.org/10.5194/acp-14-13175-2014
Tan Z, Lu K, Jiang M, Su R, Dong H, Zeng L, et al. Exploring ozone pollution in Chengdu, southwestern China: A case study from radical chemistry to O3-VOC-NOx sensitivity. Sci Total Environ 2018; 636: 775-786. https://doi.org/10.1016/j.scitotenv.2018.04.286
Jia C, Mao X, Huang T, Liang X, Wang Y, Shen Y, et al. Non-methane hydrocarbons (NMHCs) and their contribution to ozone formation potential in a petrochemical industrialized city, Northwest China. Atmos Res 2016; 169: 225-236. https://doi.org/10.1016/j.atmosres.2015.10.006
Guo H, Ling Z, Cheung K, Jiang F, Wang D, Simpson I, et al. Characterization of photochemical pollution at different elevations in mountainous areas in Hong Kong. Atmos. Chem. Phys 2013; 13: 3881-3898. https://doi.org/10.5194/acp-13-3881-2013
Geng F, Zhao C, Tang X, Lu G, Tie X. Analysis of ozone and VOCs measured in Shanghai: A case study. Atmos Environ 2007; 41(5): 989-1001. https://doi.org/10.1016/j.atmosenv.2006.09.023
An J, Zou J, Wang J, Lin X, Zhu B. Differences in ozone photochemical characteristics between the megacity Nanjing and its suburban surroundings, Yangtze River Delta, China. Environ Sci Pollut Res 2015; 22(24): 19607-19617. https://doi.org/10.1007/s11356-015-5177-0
Xu Z, Huang X, Nie W, Chi X, Xu Z, Zheng L, et, al. Influence of synoptic condition and holiday effects on VOCs and ozone production in the Yangtze River Delta region, China. Atmos Environ 2017; 168. https://doi.org/10.1016/j.atmosenv.2017.08.035
Xu Z. Measurements of Peroxyacetyl Nitrate at a Background Site in the Pearl River Delta Region: Production Efficiency and Regional Transport. Aerosol Air Qual Res 2015; 2015. https://doi.org/10.4209/aaqr.2014.11.0275
He Z, Wang X, Ling Z, Zhao J, Guo H, Shao M, et al. Contributions of different anthropogenic volatile organic compound sources to ozone formation at a receptor site in the Pearl River Delta region and its policy implications. Atmos. Chem. Phys 2019; 19(13): 8801-8816. https://doi.org/10.5194/acp-19-8801-2019
Lyu X, Wang N, Guo H, Xue L, Jiang F, Zeren Y, et al. Causes of a continuous summertime O3 pollution event in Jinan, a central city in the North China Plain. Atmos. Chem. Phys 2019; 19: 3025-3042. https://doi.org/10.5194/acp-19-3025-2019
Louie PKK, Ho JWK, Tsang RCW, Blake DR, Lau AKH, Yu J, et al. VOCs and OVOCs distribution and control policy implications in Pearl River Delta region, China. Atmos Environ 2013; 76: 125-135. https://doi.org/10.1016/j.atmosenv.2012.08.058
Wang G, Cheng S, Wei W, Zhou Y, Yao S, Zhang H. Characteristics and source apportionment of VOCs in the suburban area of Beijing, China. Atmos Pollut Res 2016; 7(4): 711-724. https://doi.org/10.1016/j.apr.2016.03.006
Lyu X, Chen N, Guo H, Zhang W, Wang N, Wang Y, et al. Ambient volatile organic compounds and their effect on ozone production in Wuhan, central China. Sci Total Environ 2016; 541: 200-209. https://doi.org/10.1016/j.scitotenv.2015.09.093
Wang Q, Li S, Dong M, Li W, Gao X, Ye R, et al. VOCs mission characteristics and priority control analysis based on VOCs emission inventories and ozone formation potentials in Zhoushan. Atmos Environ 2018; 182: 234-241. https://doi.org/10.1016/j.atmosenv.2018.03.034
Zhou M, Jiang W, Gao W, Zhou B, Liao X. A high spatiotemporal resolution anthropogenic VOC emission inventory for Qingdao City in 2016 and its ozone formation potential analysis. Process Safety and Environmental Protection 2020; 139: 147-160. https://doi.org/10.1016/j.psep.2020.03.040
Zeng P, Lyu X, Guo H, Cheng H, Jiang F, Pan W, et al. Causes of ozone pollution in summer in Wuhan, Central China. Environ Pollut 2018; 241: 852-861. https://doi.org/10.1016/j.envpol.2018.05.042
Wang Y, Wang H, Guo H, Lyu X, Cheng H, Ling Z, et al. Long-term O3-precursor relationships in Hong Kong: field observation and model simulation. Atmos. Chem. Phys 2017; 17(18): 10919-10935. https://doi.org/10.5194/acp-17-10919-2017
Fu X, Wang S, Zhao B, Xing J, Cheng Z, Liu H, et al. Emission inventory of primary pollutants and chemical speciation in 2010 for the Yangtze River Delta region, China. Atmos Environ 2013; 70: 39-50. https://doi.org/10.1016/j.atmosenv.2012.12.034
Liu Y, Li L, An J, Huang L, Yan R, Huang C, et al. Estimation of biogenic VOC emissions and its impact on ozone formation over the Yangtze River Delta region, China. Atmos Environ 2018; 186: 113-128. https://doi.org/10.1016/j.atmosenv.2018.05.027
Kudo S, Tanimoto H, Inomata S, Saito S, Pan X, Kanaya Y, et al. Emissions of nonmethane volatile organic compounds from open crop residue burning in the Yangtze River Delta region, China. J. Geophys. Res. Atmos 2014; 119 (12): 7684-7698. https://doi.org/10.1002/2013JD021044
Wang H, Lou S, Huang C, Qiao L, Tang X, Chen C, et al. Source Profiles of Volatile Organic Compounds from Biomass Burning in Yangtze River Delta, China. Aerosol Air Qual. Res. 2014; 14: 818-828. https://doi.org/10.4209/aaqr.2013.05.0174
Zhao Q, Bi J, Liu Q, Ling Z, Shen G, Chen F, et al. Sources of volatile organic compounds and policy implications for regional ozone pollution control in an urban location of Nanjing, East China. Atmos. Chem. Phys 2020; 20: 3905- 3919. https://doi.org/10.5194/acp-20-3905-2020
An J, Wang J, Zhang Y, Zhu B. Source Apportionment of Volatile Organic Compounds in an Urban Environment at the Yangtze River Delta, China. Arch. Environ. Contam. Toxicol. 2017, 72. https://doi.org/10.1007/s00244-017-0371-3