Articles | Volume 20, issue 10
https://doi.org/10.5194/acp-20-6147-2020
© Author(s) 2020. 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-20-6147-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 May 2020
Research article |
| 26 May 2020
| 26 May 2020
Significant production of ClNO2 and possible source of Cl2 from N2O5 uptake at a suburban site in eastern China
Department of Civil and Environmental Engineering, The Hong Kong
Polytechnic University, Hong Kong SAR, China
Xiang Peng
Department of Civil and Environmental Engineering, The Hong Kong
Polytechnic University, Hong Kong SAR, China
Weihao Wang
Department of Civil and Environmental Engineering, The Hong Kong
Polytechnic University, Hong Kong SAR, China
Chuan Yu
Department of Civil and Environmental Engineering, The Hong Kong
Polytechnic University, Hong Kong SAR, China
Joint International Research Laboratory of Atmospheric and Earth
System Sciences, School of Atmospheric Sciences, Nanjing University,
Nanjing, 210023, China
Yuanyuan Li
Joint International Research Laboratory of Atmospheric and Earth
System Sciences, School of Atmospheric Sciences, Nanjing University,
Nanjing, 210023, China
Yuliang Liu
Joint International Research Laboratory of Atmospheric and Earth
System Sciences, School of Atmospheric Sciences, Nanjing University,
Nanjing, 210023, China
Zhengning Xu
Joint International Research Laboratory of Atmospheric and Earth
System Sciences, School of Atmospheric Sciences, Nanjing University,
Nanjing, 210023, China
Department of Civil and Environmental Engineering, The Hong Kong
Polytechnic University, Hong Kong SAR, China
now at: Division of Environment and Sustainability, Hong Kong
University of Science and Technology, Hong Kong SAR, China
Zheng Xu
Joint International Research Laboratory of Atmospheric and Earth
System Sciences, School of Atmospheric Sciences, Nanjing University,
Nanjing, 210023, China
Joint International Research Laboratory of Atmospheric and Earth
System Sciences, School of Atmospheric Sciences, Nanjing University,
Nanjing, 210023, China
Aijun Ding
Joint International Research Laboratory of Atmospheric and Earth
System Sciences, School of Atmospheric Sciences, Nanjing University,
Nanjing, 210023, China
Department of Civil and Environmental Engineering, The Hong Kong
Polytechnic University, Hong Kong SAR, China
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Cited
35 citations as recorded by crossref.
- Modeling the Global Impact of Chlorine Chemistry on Secondary Organic Aerosols X. Liu et al. 10.1021/acs.est.4c05037
- Photodissociation of particulate nitrate as a source of daytime tropospheric Cl2 X. Peng et al. 10.1038/s41467-022-28383-9
- An Updated Anthropogenic Emission Inventory of Reactive Chlorine Precursors in China S. Yin et al. 10.1021/acsearthspacechem.2c00096
- Pollution-Derived Br2 Boosts Oxidation Power of the Coastal Atmosphere M. Xia et al. 10.1021/acs.est.2c02434
- Fast near-surface ClNO2 production and its impact on O3 formation during a heavy pollution event in South China X. Chen et al. 10.1016/j.scitotenv.2022.159998
- Widespread surface ozone reduction triggered by dust storm disturbance on ozone production and destruction chemistry Y. Zhang et al. 10.1126/sciadv.adr4297
- Multiphase Oxidation of Sulfur Dioxide in Aerosol Particles: Implications for Sulfate Formation in Polluted Environments T. Liu et al. 10.1021/acs.est.0c06496
- Formation mechanism and control strategy for particulate nitrate in China H. Wang et al. 10.1016/j.jes.2022.09.019
- Significant Impact of Reactive Chlorine on Complex Air Pollution Over the Yangtze River Delta Region, China X. Yi et al. 10.1029/2023JD038898
- Variations of chloride depletion and its impacts on ozone formation: Case study of a coastal area in Shanghai Y. Duan et al. 10.1016/j.scitotenv.2024.176899
- Increasing contribution of nighttime nitrogen chemistry to wintertime haze formation in Beijing observed during COVID-19 lockdowns C. Yan et al. 10.1038/s41561-023-01285-1
- Vertical Gradient of Nitryl Chloride and Implications for Atmospheric Photochemistry in Pearl River Delta, China, during Wintertime H. Wang et al. 10.1021/acs.est.4c08089
- Fast Nocturnal Heterogeneous Chemistry in a Coastal Background Atmosphere and Its Implications for Daytime Photochemistry Y. Niu et al. 10.1029/2022JD036716
- Distinctive Heterogeneous Reaction Mechanism of ClNO2 on the Air–Water Surface Containing Cl W. Zhang et al. 10.1021/jacs.3c07843
- Impact of Molecular Chlorine Production from Aerosol Iron Photochemistry on Atmospheric Oxidative Capacity in North China Q. Chen et al. 10.1021/acs.est.4c02534
- Reduction and Photoreduction of NO2 in Humic Acid Films as a Source of HONO, ClNO, N2O, NOX, and Organic Nitrogen H. Ricker et al. 10.1021/acsearthspacechem.2c00282
- Radical chemistry and VOCs-NOx-O3-nitrate sensitivity in the polluted atmosphere of a suburban site in the North China Plain Y. Li et al. 10.1016/j.scitotenv.2024.174405
- Increasing Contribution of Chlorine Chemistry to Wintertime Ozone Formation Promoted by Enhanced Nitrogen Chemistry G. Chen et al. 10.1021/acs.est.4c09523
- Observation based study on atmospheric oxidation capacity in Shanghai during late-autumn: Contribution from nitryl chloride S. Lou et al. 10.1016/j.atmosenv.2021.118902
- Stable oxygen isotope constraints on nitrate formation in Beijing in springtime L. Luo et al. 10.1016/j.envpol.2020.114515
- Halogens Enhance Haze Pollution in China Q. Li et al. 10.1021/acs.est.1c01949
- Atmospheric chemistry of molecular chlorine Q. Zang et al. 10.1360/TB-2024-0465
- New analysis of line positions of the ν3 bands of 35ClNO2 and 37ClNO2 around 370 cm−1 A. Anantharajah et al. 10.1016/j.jqsrt.2020.107078
- HOCl Formation Driven by Photochemical Processes Enhanced Atmospheric Oxidation Capacity in a Coastal Atmosphere G. Chen et al. 10.1021/acs.est.5c01363
- Significant Impact of a Daytime Halogen Oxidant on Coastal Air Quality J. Dai et al. 10.1021/acs.est.4c08360
- What drives anthropogenic fine particulate chloride emissions in India? – A quantitative assessment of hotspots P. Sahoo et al. 10.1016/j.scitotenv.2025.179949
- Nitrate formation mechanisms causing high concentration of PM2.5 in a residential city with low anthropogenic emissions during cold season J. Jeon et al. 10.1016/j.envpol.2024.124141
- Large Daytime Molecular Chlorine Missing Source at a Suburban Site in East China Q. Chen et al. 10.1029/2021JD035796
- Observation of nitrogen oxide-influenced chlorine chemistry and source analysis of Cl2 in the Yangtze River Delta, China F. Li et al. 10.1016/j.atmosenv.2023.119829
- Driving factors and photochemical impacts of Cl2 in coastal atmosphere of Southeast China G. Chen et al. 10.1038/s41612-025-01022-y
- Reactive Chlorine Species Advancing the Atmospheric Oxidation Capacities of Inland Urban Environments W. Ma et al. 10.1021/acs.est.3c05169
- Atmospheric degradation of biofuel cyclic esters initiated by chlorine atom: Product yields and ring-retaining oxidation vs. ring opening mechanisms A. Baptista et al. 10.1016/j.atmosenv.2025.121073
- Intercomparison of measured and modelled photochemical ozone production rates: Suggestion of chemistry hypothesis regarding unmeasured VOCs J. Zhou et al. 10.1016/j.scitotenv.2024.175290
- An Alternative Calibration Method for Measuring N2O5 with an Iodide-Chemical Ionization Mass Spectrometer and Influencing Factors Y. Liu et al. 10.1021/acs.analchem.3c04089
- Enhanced oxidation capacity driven by pollution-induced chlorine chemistry in the coastal atmosphere G. Chen et al. 10.1038/s41612-025-01133-6
35 citations as recorded by crossref.
- Modeling the Global Impact of Chlorine Chemistry on Secondary Organic Aerosols X. Liu et al. 10.1021/acs.est.4c05037
- Photodissociation of particulate nitrate as a source of daytime tropospheric Cl2 X. Peng et al. 10.1038/s41467-022-28383-9
- An Updated Anthropogenic Emission Inventory of Reactive Chlorine Precursors in China S. Yin et al. 10.1021/acsearthspacechem.2c00096
- Pollution-Derived Br2 Boosts Oxidation Power of the Coastal Atmosphere M. Xia et al. 10.1021/acs.est.2c02434
- Fast near-surface ClNO2 production and its impact on O3 formation during a heavy pollution event in South China X. Chen et al. 10.1016/j.scitotenv.2022.159998
- Widespread surface ozone reduction triggered by dust storm disturbance on ozone production and destruction chemistry Y. Zhang et al. 10.1126/sciadv.adr4297
- Multiphase Oxidation of Sulfur Dioxide in Aerosol Particles: Implications for Sulfate Formation in Polluted Environments T. Liu et al. 10.1021/acs.est.0c06496
- Formation mechanism and control strategy for particulate nitrate in China H. Wang et al. 10.1016/j.jes.2022.09.019
- Significant Impact of Reactive Chlorine on Complex Air Pollution Over the Yangtze River Delta Region, China X. Yi et al. 10.1029/2023JD038898
- Variations of chloride depletion and its impacts on ozone formation: Case study of a coastal area in Shanghai Y. Duan et al. 10.1016/j.scitotenv.2024.176899
- Increasing contribution of nighttime nitrogen chemistry to wintertime haze formation in Beijing observed during COVID-19 lockdowns C. Yan et al. 10.1038/s41561-023-01285-1
- Vertical Gradient of Nitryl Chloride and Implications for Atmospheric Photochemistry in Pearl River Delta, China, during Wintertime H. Wang et al. 10.1021/acs.est.4c08089
- Fast Nocturnal Heterogeneous Chemistry in a Coastal Background Atmosphere and Its Implications for Daytime Photochemistry Y. Niu et al. 10.1029/2022JD036716
- Distinctive Heterogeneous Reaction Mechanism of ClNO2 on the Air–Water Surface Containing Cl W. Zhang et al. 10.1021/jacs.3c07843
- Impact of Molecular Chlorine Production from Aerosol Iron Photochemistry on Atmospheric Oxidative Capacity in North China Q. Chen et al. 10.1021/acs.est.4c02534
- Reduction and Photoreduction of NO2 in Humic Acid Films as a Source of HONO, ClNO, N2O, NOX, and Organic Nitrogen H. Ricker et al. 10.1021/acsearthspacechem.2c00282
- Radical chemistry and VOCs-NOx-O3-nitrate sensitivity in the polluted atmosphere of a suburban site in the North China Plain Y. Li et al. 10.1016/j.scitotenv.2024.174405
- Increasing Contribution of Chlorine Chemistry to Wintertime Ozone Formation Promoted by Enhanced Nitrogen Chemistry G. Chen et al. 10.1021/acs.est.4c09523
- Observation based study on atmospheric oxidation capacity in Shanghai during late-autumn: Contribution from nitryl chloride S. Lou et al. 10.1016/j.atmosenv.2021.118902
- Stable oxygen isotope constraints on nitrate formation in Beijing in springtime L. Luo et al. 10.1016/j.envpol.2020.114515
- Halogens Enhance Haze Pollution in China Q. Li et al. 10.1021/acs.est.1c01949
- Atmospheric chemistry of molecular chlorine Q. Zang et al. 10.1360/TB-2024-0465
- New analysis of line positions of the ν3 bands of 35ClNO2 and 37ClNO2 around 370 cm−1 A. Anantharajah et al. 10.1016/j.jqsrt.2020.107078
- HOCl Formation Driven by Photochemical Processes Enhanced Atmospheric Oxidation Capacity in a Coastal Atmosphere G. Chen et al. 10.1021/acs.est.5c01363
- Significant Impact of a Daytime Halogen Oxidant on Coastal Air Quality J. Dai et al. 10.1021/acs.est.4c08360
- What drives anthropogenic fine particulate chloride emissions in India? – A quantitative assessment of hotspots P. Sahoo et al. 10.1016/j.scitotenv.2025.179949
- Nitrate formation mechanisms causing high concentration of PM2.5 in a residential city with low anthropogenic emissions during cold season J. Jeon et al. 10.1016/j.envpol.2024.124141
- Large Daytime Molecular Chlorine Missing Source at a Suburban Site in East China Q. Chen et al. 10.1029/2021JD035796
- Observation of nitrogen oxide-influenced chlorine chemistry and source analysis of Cl2 in the Yangtze River Delta, China F. Li et al. 10.1016/j.atmosenv.2023.119829
- Driving factors and photochemical impacts of Cl2 in coastal atmosphere of Southeast China G. Chen et al. 10.1038/s41612-025-01022-y
- Reactive Chlorine Species Advancing the Atmospheric Oxidation Capacities of Inland Urban Environments W. Ma et al. 10.1021/acs.est.3c05169
- Atmospheric degradation of biofuel cyclic esters initiated by chlorine atom: Product yields and ring-retaining oxidation vs. ring opening mechanisms A. Baptista et al. 10.1016/j.atmosenv.2025.121073
- Intercomparison of measured and modelled photochemical ozone production rates: Suggestion of chemistry hypothesis regarding unmeasured VOCs J. Zhou et al. 10.1016/j.scitotenv.2024.175290
- An Alternative Calibration Method for Measuring N2O5 with an Iodide-Chemical Ionization Mass Spectrometer and Influencing Factors Y. Liu et al. 10.1021/acs.analchem.3c04089
- Enhanced oxidation capacity driven by pollution-induced chlorine chemistry in the coastal atmosphere G. Chen et al. 10.1038/s41612-025-01133-6
Latest update: 11 Jul 2025
Short summary
ClNO2 and Cl2 can be photolyzed by sunlight to produce a highly reactive Cl atom which affects air quality and climate. We observed high ClNO2 and Cl2 concentrations during a recent field study in east China. We analyzed the data and proposed a new hypothesis on the Cl2 production mechanism. Yields of ClNO2 and Cl2 from N2O2 uptake were parameterized using observational constraints, and they can be used in air quality models to improve simulations of atmospheric photochemistry and air quality.
ClNO2 and Cl2 can be photolyzed by sunlight to produce a highly reactive Cl atom which affects...
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