Articles | Volume 24, issue 11
https://doi.org/10.5194/acp-24-6865-2024
© Author(s) 2024. 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-24-6865-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Measurement report: Enhanced photochemical formation of formic and isocyanic acids in urban regions aloft – insights from tower-based online gradient measurements
Qing Yang
College of Environment and Climate, Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China
Xiao-Bing Li
CORRESPONDING AUTHOR
College of Environment and Climate, Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China
College of Environment and Climate, Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China
Xiaoxiao Zhang
College of Environment and Climate, Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China
Yibo Huangfu
College of Environment and Climate, Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China
Lei Yang
College of Environment and Climate, Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China
Xianjun He
College of Environment and Climate, Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China
Jipeng Qi
College of Environment and Climate, Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China
Min Shao
College of Environment and Climate, Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China
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Cited
10 citations as recorded by crossref.
- A new parameterization of photolysis rates for oxygenated volatile organic compounds (OVOCs) Y. Peng et al. https://doi.org/10.5194/acp-25-7037-2025
- Unraveling the Formation and Evolution of Winter Haze in Beijing: Insights from Vertical Measurements of Particle Size Distributions and Aerosol Composition Y. Sun et al. https://doi.org/10.1021/acsestair.5c00264
- Aircraft-based observation of volatile organic compounds (VOCs) over the North China Plain Y. Huangfu et al. https://doi.org/10.5194/acp-25-17613-2025
- Vertical changes in volatile organic compounds (VOCs) and impacts on photochemical ozone formation X. Li et al. https://doi.org/10.5194/acp-25-2459-2025
- Oxygenated Organic Molecules over the Boundary Layer Aloft in Beijing N. Yao et al. https://doi.org/10.1021/acs.est.5c01020
- First Retrieval of Formic Acid from GOSAT-2 Thermal–Infrared Observations over Land F. Xie et al. https://doi.org/10.3390/rs18162750
- Elucidating key factors in regulating budgets of ozone and its precursors in atmospheric boundary layer X. Song et al. https://doi.org/10.1038/s41612-024-00818-8
- Significant but Overlooked: The Role of Anthropogenic Monoterpenes in Ozone Formation in a Chinese Megacity Q. Xie et al. https://doi.org/10.1021/acs.est.5c00001
- Effect of Initial Seed Aerosol Acidity on the Kinetics and Products of Heterogeneous Hydroxyl Radical Oxidation of Isoprene Epoxydiol-Derived Secondary Organic Aerosol J. Yan et al. https://doi.org/10.1021/acs.jpca.4c08082
- Application of a human bronchoepithelial—air–liquid interface model to assess respiratory hazard of VOCs using a benchmark concentration modeling approach O. Lampe et al. https://doi.org/10.1080/08958378.2026.2623547
10 citations as recorded by crossref.
- A new parameterization of photolysis rates for oxygenated volatile organic compounds (OVOCs) Y. Peng et al. https://doi.org/10.5194/acp-25-7037-2025
- Unraveling the Formation and Evolution of Winter Haze in Beijing: Insights from Vertical Measurements of Particle Size Distributions and Aerosol Composition Y. Sun et al. https://doi.org/10.1021/acsestair.5c00264
- Aircraft-based observation of volatile organic compounds (VOCs) over the North China Plain Y. Huangfu et al. https://doi.org/10.5194/acp-25-17613-2025
- Vertical changes in volatile organic compounds (VOCs) and impacts on photochemical ozone formation X. Li et al. https://doi.org/10.5194/acp-25-2459-2025
- Oxygenated Organic Molecules over the Boundary Layer Aloft in Beijing N. Yao et al. https://doi.org/10.1021/acs.est.5c01020
- First Retrieval of Formic Acid from GOSAT-2 Thermal–Infrared Observations over Land F. Xie et al. https://doi.org/10.3390/rs18162750
- Elucidating key factors in regulating budgets of ozone and its precursors in atmospheric boundary layer X. Song et al. https://doi.org/10.1038/s41612-024-00818-8
- Significant but Overlooked: The Role of Anthropogenic Monoterpenes in Ozone Formation in a Chinese Megacity Q. Xie et al. https://doi.org/10.1021/acs.est.5c00001
- Effect of Initial Seed Aerosol Acidity on the Kinetics and Products of Heterogeneous Hydroxyl Radical Oxidation of Isoprene Epoxydiol-Derived Secondary Organic Aerosol J. Yan et al. https://doi.org/10.1021/acs.jpca.4c08082
- Application of a human bronchoepithelial—air–liquid interface model to assess respiratory hazard of VOCs using a benchmark concentration modeling approach O. Lampe et al. https://doi.org/10.1080/08958378.2026.2623547
Saved (final revised paper)
Latest update: 18 Sep 2026
Short summary
Online vertical gradient measurements of formic and isocyanic acids were made based on a 320 m tower in a megacity. Vertical variations and sources of the two acids were analyzed in this study. We find that formic and isocyanic acids exhibited positive vertical gradients and were mainly contributed by photochemical formations. The formation of formic and isocyanic acids was also significantly enhanced in urban regions aloft.
Online vertical gradient measurements of formic and isocyanic acids were made based on a 320 m...
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