Articles | Volume 25, issue 2
https://doi.org/10.5194/acp-25-905-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-905-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
23 Jan 2025
Research article |
| 23 Jan 2025
| 23 Jan 2025
Understanding summertime peroxyacetyl nitrate (PAN) formation and its relation to aerosol pollution: insights from high-resolution measurements and modeling
Baoye Hu
College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou 363000, China
Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University, Zhangzhou 363000, China
Fujian Province University Key Laboratory of Pollution Monitoring and Control, Minnan Normal University, Zhangzhou 363000, China
Naihua Chen
College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou 363000, China
Pingtan Environmental Monitoring Center of Fujian, Fuzhou, Pingtan 350400, China
Rui Li
Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Science, East China Normal University, Shanghai 200241, China
Mingqiang Huang
College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou 363000, China
Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University, Zhangzhou 363000, China
Fujian Province University Key Laboratory of Pollution Monitoring and Control, Minnan Normal University, Zhangzhou 363000, China
Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention, Chinese Academy of Sciences, Xiamen 361021, China
Youwei Hong
Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention, Chinese Academy of Sciences, Xiamen 361021, China
Lingling Xu
Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention, Chinese Academy of Sciences, Xiamen 361021, China
Xiaolong Fan
Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention, Chinese Academy of Sciences, Xiamen 361021, China
Mengren Li
Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention, Chinese Academy of Sciences, Xiamen 361021, China
Lei Tong
Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
Qiuping Zheng
Xiamen Key Laboratory of Straits Meteorology, Xiamen Meteorological Bureau, Xiamen 361012, China
Yuxiang Yang
CORRESPONDING AUTHOR
Pingtan Environmental Monitoring Center of Fujian, Fuzhou, Pingtan 350400, China
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Taotao Liu, Yiling Lin, Jinsheng Chen, Gaojie Chen, Chen Yang, Lingling Xu, Mengren Li, Xiaolong Fan, Yanting Chen, Liqian Yin, Yuping Chen, Xiaoting Ji, Ziyi Lin, Fuwang Zhang, Hong Wang, and Youwei Hong
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Revised manuscript not accepted
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Taotao Liu, Gaojie Chen, Jinsheng Chen, Lingling Xu, Mengren Li, Youwei Hong, Yanting Chen, Xiaoting Ji, Chen Yang, Yuping Chen, Weiguo Huang, Quanjia Huang, and Hong Wang
Atmos. Chem. Phys., 22, 4339–4353, https://doi.org/10.5194/acp-22-4339-2022, https://doi.org/10.5194/acp-22-4339-2022, 2022
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We clarified the seasonal variations of PAN pollution, influencing factors, its mechanisms, and impacts on O3 based on OBM and GAM models. PAN presented inhibition and promotion effects on O3 under low and high ROx levels. Monitoring of PAN and its precursors, and the quantification of its impacts on O3 formation, significantly guide photochemical pollution control. The analysis methods used in this study provide a reference for study of the formation mechanisms of PAN and O3 in other regions.
Taotao Liu, Youwei Hong, Mengren Li, Lingling Xu, Jinsheng Chen, Yahui Bian, Chen Yang, Yangbin Dan, Yingnan Zhang, Likun Xue, Min Zhao, Zhi Huang, and Hong Wang
Atmos. Chem. Phys., 22, 2173–2190, https://doi.org/10.5194/acp-22-2173-2022, https://doi.org/10.5194/acp-22-2173-2022, 2022
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Based on the OBM-MCM model analyses, the study aims to clarify (1) the pollution characteristics of O3 and its precursors, (2) the atmospheric oxidation capacity and radical chemistry, and (3) the O3 formation mechanism and sensitivity analysis. The results are expected to enhance the understanding of the O3 formation mechanism with low O3 precursor levels and provide scientific evidence for O3 pollution control in coastal cities.
Baoye Hu, Jun Duan, Youwei Hong, Lingling Xu, Mengren Li, Yahui Bian, Min Qin, Wu Fang, Pinhua Xie, and Jinsheng Chen
Atmos. Chem. Phys., 22, 371–393, https://doi.org/10.5194/acp-22-371-2022, https://doi.org/10.5194/acp-22-371-2022, 2022
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There has been a lack of research into HONO in coastal cities with low concentrations of PM2.5, but strong sunlight and high humidity. Insufficient research on coastal cities with good air quality has resulted in certain obstacles to assessing the photochemical processes in these areas. Furthermore, HONO contributes to the atmospheric photochemistry depending on the season. Therefore, observations of HONO across four seasons in the southeastern coastal area of China are urgently needed.
Lingling Xu, Jiayan Shi, Yuping Chen, Yanru Zhang, Mengrong Yang, Yanting Chen, Liqian Yin, Lei Tong, Hang Xiao, and Jinsheng Chen
Atmos. Chem. Phys., 21, 18543–18555, https://doi.org/10.5194/acp-21-18543-2021, https://doi.org/10.5194/acp-21-18543-2021, 2021
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Mercury (Hg) isotopic compositions in aerosols are the mixed results of emission sources and atmospheric processes. This study presents Hg isotopic compositions in PM2.5 from different types of locations and total Hg from offshore surface seawater. The results indicate that atmospheric transformations induce significant mass independent fractionation of Hg isotopes, which obscures Hg isotopic signatures of initial emissions.
Rui Li, Yilong Zhao, Hongbo Fu, Jianmin Chen, Meng Peng, and Chunying Wang
Atmos. Chem. Phys., 21, 8677–8692, https://doi.org/10.5194/acp-21-8677-2021, https://doi.org/10.5194/acp-21-8677-2021, 2021
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Based on a random forest model, the strict lockdown measures significantly decreased primary components such as Cr (−67 %) and Fe (−61 %) in PM2.5 (p < 0.01), whereas the higher relative humidity (RH) and NH3 level and the lower air temperature (T) remarkably enhanced the production of secondary aerosol including SO42− (29 %), NO3− (29 %), and NH4+ (21 %) (p < 0.05). The natural experiment suggested that the NH3 emission should be strictly controlled.
Rui Li, Lulu Cui, Yilong Zhao, Wenhui Zhou, and Hongbo Fu
Earth Syst. Sci. Data, 13, 2147–2163, https://doi.org/10.5194/essd-13-2147-2021, https://doi.org/10.5194/essd-13-2147-2021, 2021
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A unique monthly NO3− dataset at 0.25° resolution over China during 2005–2015 was developed by assimilating multi-source variables. The newly developed product featured an excellent cross-validation R2 value (0.78) and relatively lower RMSE (1.19 μg N m−3) and mean absolute error (MAE: 0.81 μg N m−3). The dataset also exhibited relatively robust performance at the spatial and temporal scales. The dataset over China could deepen knowledge of the status of N pollution in China.
Baoye Hu, Jun Duan, Youwei Hong, Lingling Xu, Mengren Li, Yahui Bian, Min Qin, Wu Fang, Pinhua Xie, and Jinsheng Chen
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-880, https://doi.org/10.5194/acp-2020-880, 2020
Revised manuscript not accepted
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There has been a lack of research into HONO in coastal cities with low concentrations of NOx and PM2.5, but strong sunlight and high humidity. Insufficient research on coastal cities with good air quality has resulted in certain obstacles to assessing the photochemical processes in these areas. Furthermore, HONO contributes to the atmospheric photochemistry depending on the season. Therefore, observations of HONO across four seasons in the southeastern coastal area of China are urgently needed.
Cited articles
Behera, S. N., Sharma, M., Aneja, V. P., and Balasubramanian, R.: Ammonia in the atmosphere: a review on emission sources, atmospheric chemistry and deposition on terrestrial bodies, Environ. Sci. Pollut. R., 20, 8092–8131, https://doi.org/10.1007/s11356-013-2051-9, 2013.
Cox, R. A. and Roffey, M. J. : Thermal decomposition of peroxyacetylnitrate in the presence of nitric oxide, Environ. Sci. Technol., 11, 900–906, https://doi.org/10.1021/es60132a010, 1977.
Duan, J., Qin, M., Ouyang, B., Fang, W., Li, X., Lu, K., Tang, K., Liang, S., Meng, F., Hu, Z., Xie, P., Liu, W., and Häsler, R.: Development of an incoherent broadband cavity-enhanced absorption spectrometer for in situ measurements of HONO and NO2, Atmos. Meas. Tech., 11, 4531–4543, https://doi.org/10.5194/amt-11-4531-2018, 2018.
Hong, Z., Li, M., Wang, H., Xu, L., Hong, Y., Chen, J., Chen, J., Zhang, H., Zhang, Y., Wu, X., Hu, B., and Li, M.: Characteristics of atmospheric volatile organic compounds (VOCs) at a mountainous forest site and two urban sites in the southeast of China, Sci. Total Environ., 657, 1491–1500, https://doi.org/10.1016/j.scitotenv.2018.12.132, 2019.
Hu, B., Liu, T., Hong, Y., Xu, L., Li, M., Wu, X., Wang, H., Chen, J., and Chen, J.: Characteristics of peroxyacetyl nitrate (PAN) in a coastal city of southeastern China: Photochemical mechanism and pollution process, Sci. Total Environ., 719, 137493, https://doi.org/10.1016/j.scitotenv.2020.137493, 2020.
Hu, B., Duan, J., Hong, Y., Xu, L., Li, M., Bian, Y., Qin, M., Fang, W., Xie, P., and Chen, J.: Exploration of the atmospheric chemistry of nitrous acid in a coastal city of southeastern China: results from measurements across four seasons, Atmos. Chem. Phys., 22, 371–393, https://doi.org/10.5194/acp-22-371-2022, 2022.
Hu, B., Wang, Y., Chen, J., Chen, N., Hong, Y., Xu, L., Fan, X., Li, M., and Tong, L.: The observation of atmospheric HONO by wet-rotating-denuder ion chromatograph in a coastal city: Performance and influencing factors, Environ. Pollut., 356, 124355, https://doi.org/10.1016/j.envpol.2024.124355, 2024.
Li, H., Yang, Y., Su, H., Wang, H., Wang, P., and Liao, H.: Ozone pollution in China affected by climate change in a carbon neutral future as predicted by a process-based interpretable machine learning method, Geophys. Res. Lett., 51, e2024GL109520, https://doi.org/10.1029/2024GL109520, 2024.
Lin, Z., Xu, L., Yang, C., Chen, G., Ji, X., Li, L., Zhang, K., Hong, Y., Li, M., Fan, X., Hu, B., Zhang, F., and Chen, J.: Trends of peroxyacetyl nitrate and its impact on ozone over 2018–2022 in urban atmosphere, npj Climate and Atmospheric Science, 7, 192, https://doi.org/10.1038/s41612-024-00746-7, 2024.
Liu, L., Wang, X., Chen, J., Xue, L., Wang, W., Wen, L., Li, D., and Chen, T.: Understanding unusually high levels of peroxyacetyl nitrate (PAN) in winter in Urban Jinan, China, J. Environ. Sci., 71, 249–260, https://doi.org/10.1016/j.jes.2018.05.015, 2018.
Liu, T., Chen, G., Chen, J., Xu, L., Li, M., Hong, Y., Chen, Y., Ji, X., Yang, C., Chen, Y., Huang, W., Huang, Q., and Wang, H.: Seasonal characteristics of atmospheric peroxyacetyl nitrate (PAN) in a coastal city of Southeast China: Explanatory factors and photochemical effects, Atmos. Chem. Phys., 22, 4339–4353, https://doi.org/10.5194/acp-22-4339-2022, 2022a.
Liu, T., Hong, Y., Li, M., Xu, L., Chen, J., Bian, Y., Yang, C., Dan, Y., Zhang, Y., Xue, L., Zhao, M., Huang, Z., and Wang, H.: Atmospheric oxidation capacity and ozone pollution mechanism in a coastal city of southeastern China: analysis of a typical photochemical episode by an observation-based model, Atmos. Chem. Phys., 22, 2173–2190, https://doi.org/10.5194/acp-22-2173-2022, 2022b.
Liu, T., Wang, Y., Cai, H., Wang, H., Zhang, C., Chen, J., Dai, Y., Zhao, W., Li, J., Gong, D., Chen, D., Zhai, Y., Zhou, Y., Liao, T., and Wang, B.: Complexities of peroxyacetyl nitrate photochemistry and its control strategies in contrasting environments in the Pearl River Delta region, npj Climate and Atmospheric Science, 7, 116, https://doi.org/10.1038/s41612-024-00669-3, 2024.
Liu, X., Guo, H., Zeng, L., Lyu, X., Wang, Y., Zeren, Y., Yang, J., Zhang, L., Zhao, S., Li, J., and Zhang, G.: Photochemical ozone pollution in five Chinese megacities in summer 2018, Sci. Total Environ., 801, 149603, https://doi.org/10.1016/j.scitotenv.2021.149603, 2021a.
Liu, Y., Shen, H., Mu, J., Li, H., Chen, T., Yang, J., Jiang, Y., Zhu, Y., Meng, H., Dong, C., Wang, W., and Xue, L.: Formation of peroxyacetyl nitrate (PAN) and its impact on ozone production in the coastal atmosphere of Qingdao, North China, Sci. Total Environ., 778, 146265, https://doi.org/10.1016/j.scitotenv.2021.146265, 2021b.
Lu, X., Zhang, L., Wang, X., Gao, M., Li, K., Zhang, Y., Yue, X., and Zhang, Y.: Rapid Increases in Warm-Season Surface Ozone and Resulting Health Impact in China Since 2013, Environ. Sci. Tech. Let., 7, 240–247, https://doi.org/10.1021/acs.estlett.0c00171, 2020.
Marley, N. A., Gaffney, J. S., Ramos-Villegas, R., and Cárdenas González, B.: Comparison of measurements of peroxyacyl nitrates and primary carbonaceous aerosol concentrations in Mexico City determined in 1997 and 2003, Atmos. Chem. Phys., 7, 2277–2285, https://doi.org/10.5194/acp-7-2277-2007, 2007.
Pratap, V., Carlton, A. G., Christiansen, A. E., and Hennigan, C. J.: Partitioning of ambient organic gases to inorganic salt solutions: influence of salt identity, ionic strength, and pH, Geophys. Res. Lett., 48, e2021GL095247, https://doi.org/10.1029/2021GL095247, 2021.
Roberts, J. M., Flocke, F., Stroud, C. A., Hereid, D., Williams, E., Fehsenfeld, F., Brune, W., Martinez, M., and Harder, H.: Ground-based measurements of peroxycarboxylic nitric anhydrides (PANs) during the 1999 Southern Oxidants Study Nashville Intensive, J. Geophys. Res.-Atmos., 107, ACH 1-1–ACH 1-10, https://doi.org/10.1029/2001jd000947, 2002.
Sun, M., Cui, J. N., Zhao, X., and Zhang, J.: Impacts of precursors on peroxyacetyl nitrate (PAN) and relative formation of PAN to ozone in a southwestern megacity of China, Atmos. Environ., 231, 117542, https://doi.org/10.1016/j.atmosenv.2020.117542, 2020.
Sun, M., Zhou, Y., Wang, Y., Qiao, X., Wang, J., and Zhang, J.: Heterogeneous reaction of peroxyacetyl nitrate on real-world PM2.5 aerosols: Kinetics, influencing Factors, and atmospheric implications, Environ. Sci. Technol., 56, 9325–9334, https://doi.org/10.1021/acs.est.2c03050, 2022.
Taylor, O. C.: Importance of peroxyacetyl nitrate (PAN) as a phytotoxic air pollutant, Journal of the Air Pollution Control Association, 19, 347–351, https://doi.org/10.1080/00022470.1969.10466498, 1969.
Tuazon, E. C., Carter, W. P., and Atkinson, R.: Thermal decomposition of peroxyacetyl nitrate and reactions of acetyl peroxy radicals with nitric oxide and nitrogen dioxide over the temperature range 283-313 K, J. Phys. Chem., 95, 2434–2437, https://doi.org/10.1021/j100159a059, 1991.
Wang, B., Shao, M., Roberts, J. M., Yang, G., Yang, F., Hu, M., Zeng, L., Zhang, Y., and Zhang, J.: Ground-based on-line measurements of peroxyacetyl nitrate (PAN) and peroxypropionyl nitrate (PPN) in the Pearl River Delta, China, Int. J. Environ. An. Ch., 90, 548–559, https://doi.org/10.1080/03067310903194972, 2010.
Wang, H., Lyu, X., Guo, H., Wang, Y., Zou, S., Ling, Z., Wang, X., Jiang, F., Zeren, Y., Pan, W., Huang, X., and Shen, J.: Ozone pollution around a coastal region of South China Sea: interaction between marine and continental air, Atmos. Chem. Phys., 18, 4277–4295, https://doi.org/10.5194/acp-18-4277-2018, 2018.
Wang, Y., Liu, T., Gong, D., Wang, H., Guo, H., Liao, M., Deng, S., Cai, H., and Wang, B.: Anthropogenic pollutants induce changes in peroxyacetyl nitrate formation intensity and pathways in a mountainous background atmosphere in southern China, Environ. Sci. Technol., 57, 6253–6262, https://doi.org/10.1021/acs.est.2c02845, 2023.
Wu, X., Xu, L., Hong, Y., Chen, J., Qiu, Y., Hu, B., Hong, Z., Zhang, Y., Liu, T., Chen, Y., Bian, Y., Zhao, G., Chen, J., and Li, M.: The air pollution governed by subtropical high in a coastal city in Southeast China: Formation processes and influencing mechanisms, Sci. Total Environ., 692, 1135–1145, https://doi.org/10.1016/j.scitotenv.2019.07.341, 2019.
Xu, W., Zhang, G., Wang, Y., Tong, S., Zhang, W., Ma, Z., Lin, W., Kuang, Y., Yin, L., and Xu, X.: Aerosol promotes peroxyacetyl nitrate formation during winter in the North China Plain, Environ. Sci. Technol., 55, 3568–3581, https://doi.org/10.1021/acs.est.0c08157, 2021.
Xu, X., Zhang, H., Lin, W., Wang, Y., Xu, W., and Jia, S.: First simultaneous measurements of peroxyacetyl nitrate (PAN) and ozone at Nam Co in the central Tibetan Plateau: impacts from the PBL evolution and transport processes, Atmos. Chem. Phys., 18, 5199–5217, https://doi.org/10.5194/acp-18-5199-2018, 2018.
Xu, Z., Xue, L., Wang, T., Xia, T., Gao, Y., Louie, P. K. K., and Luk, C. W. Y.: Measurements of peroxyacetyl nitrate at a background site in the Pearl River Delta region: production efficiency and regional transport, Aerosol Air Qual. Res., 15, 833–841, https://doi.org/10.4209/aaqr.2014.11.0275, 2015.
Xue, L., Wang, T., Wang, X., Blake, D. R., Gao, J., Nie, W., Gao, R., Gao, X., Xu, Z., Ding, A., Huang, Y., Lee, S., Chen, Y., Wang, S., Chai, F., Zhang, Q., and Wang, W.: On the use of an explicit chemical mechanism to dissect peroxy acetyl nitrate formation, Environ. Pollut., 195, 39–47, https://doi.org/10.1016/j.envpol.2014.08.005, 2014.
Xue, L. K., Wang, T., Guo, H., Blake, D. R., Tang, J., Zhang, X. C., Saunders, S. M., and Wang, W. X.: Sources and photochemistry of volatile organic compounds in the remote atmosphere of western China: results from the Mt. Waliguan Observatory, Atmos. Chem. Phys., 13, 8551–8567, https://doi.org/10.5194/acp-13-8551-2013, 2013.
Yang, X., Wu, K., Wang, H., Liu, Y., Gu, S., Lu, Y., Zhang, X., Hu, Y., Ou, Y., Wang, S., and Wang, Z.: Summertime ozone pollution in Sichuan Basin, China: Meteorological conditions, sources and process analysis, Atmos. Environ., 226, 117392, https://doi.org/10.1016/j.atmosenv.2020.117392, 2020.
Ye, C., Zhang, N., Gao, H., and Zhou, X.: Photolysis of particulate nitrate as a source of HONO and NOx, Environ. Sci. Technol., 51, 6849–6856, https://doi.org/10.1021/acs.est.7b00387, 2017.
Yuan, J., Ling, Z., Wang, Z., Lu, X., Fan, S., He, Z., Guo, H., Wang, X., and Wang, N.: PAN–precursor relationship and process analysis of PAN variations in the Pearl River Delta region, Atmosphere, 9, 372, https://doi.org/10.3390/atmos9100372, 2018.
Yukihiro, M., Hiramatsu, T., Bouteau, F., Kadono, T., and Kawano, T.: Peroxyacetyl nitrate-induced oxidative and calcium signaling events leading to cell death in ozone-sensitive tobacco cell-line, Plant Signaling & Behavior, 7, 113–120, https://doi.org/10.4161/psb.7.1.18376, 2012.
Zeng, L., Fan, G. J., Lyu, X., Guo, H., Wang, J. L., and Yao, D.: Atmospheric fate of peroxyacetyl nitrate in suburban Hong Kong and its impact on local ozone pollution, Environ. Pollut., 252, 1910–1919, https://doi.org/10.1016/j.envpol.2019.06.004, 2019.
Zhai, S., Jacob, D. J., Franco, B., Clarisse, L., Coheur, P., Shah, V., Bates, K. H., Lin, H., Dang, R., Sulprizio, M. P., Huey, L. G., Moore, F. L., Jaffe, D. A., and Liao, H.: Transpacific transport of Asian peroxyacetyl nitrate (PAN) observed from satellite: implications for ozone, Environ. Sci. Technol., 58, 9760–9769, https://doi.org/10.1021/acs.est.4c01980, 2024.
Zhang, G., Mu, Y., Zhou, L., Zhang, C., Zhang, Y., Liu, J., Fang, S., and Yao, B.: Summertime distributions of peroxyacetyl nitrate (PAN) and peroxypropionyl nitrate (PPN) in Beijing: Understanding the sources and major sink of PAN, Atmos. Environ., 103, 289–296, https://doi.org/10.1016/j.atmosenv.2014.12.035, 2015.
Zhang, J., Guo, Y., Qu, Y., Chen, Y., Yu, R., Xue, C., Yang, R., Zhang, Q., Liu, X., Mu, Y., Wang, J., Ye, C., Zhao, H., Sun, Q., Wang, Z., and An, J.: Effect of potential HONO sources on peroxyacetyl nitrate (PAN) formation in eastern China in winter, J. Environ. Sci.-China, 94, 81–87, https://doi.org/10.1016/j.jes.2020.03.039, 2020.
Zhang, J. M., Wang, T., Ding, A. J., Zhou, X. H., Xue, L. K., Poon, C. N., Wu, W. S., Gao, J., Zuo, H. C., Chen, J. M., Zhang, X. C., and Fan, S. J.: Continuous measurement of peroxyacetyl nitrate (PAN) in suburban and remote areas of western China, Atmos. Environ., 43, 228–237, https://doi.org/10.1016/j.atmosenv.2008.09.070, 2009.
Zhu, J., Wang, S., Wang, H., Jing, S., Lou, S., Saiz-Lopez, A., and Zhou, B.: Observationally constrained modeling of atmospheric oxidation capacity and photochemical reactivity in Shanghai, China, Atmos. Chem. Phys., 20, 1217–1232, https://doi.org/10.5194/acp-20-1217-2020, 2020.
Short summary
Box modeling with the Master Chemical Mechanism (MCM) was used to explore summertime peroxyacetyl nitrate (PAN) formation and its link to aerosol pollution under high-ozone conditions. The MCM model is effective in the study of PAN photochemical formation and performed better during the clean period than the haze period. Machine learning analysis identified ammonia, nitrate, and fine particulate matter as the top three factors contributing to simulation bias.
Box modeling with the Master Chemical Mechanism (MCM) was used to explore summertime...
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