Articles | Volume 23, issue 7
https://doi.org/10.5194/acp-23-4203-2023
© Author(s) 2023. 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-23-4203-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Nitrate chemistry in the northeast US – Part 2: Oxygen isotopes reveal differences in particulate and gas-phase formation
Heejeong Kim
CORRESPONDING AUTHOR
Department of Earth, Environmental, and Planetary Sciences, Brown
University, Providence, RI 02912, USA
Institute at Brown for Environment and Society, Brown University,
Providence, RI 02912, USA
Wendell W. Walters
CORRESPONDING AUTHOR
Institute at Brown for Environment and Society, Brown University,
Providence, RI 02912, USA
now at: Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA
Claire Bekker
Department of Earth, Environmental, and Planetary Sciences, Brown
University, Providence, RI 02912, USA
now at: Environmental Health Sciences, University of California Los
Angeles, Los Angeles, CA 90095, USA
Lee T. Murray
Department of Earth and Environmental Sciences, University of
Rochester, Rochester, NY 14627, USA
Meredith G. Hastings
Department of Earth, Environmental, and Planetary Sciences, Brown
University, Providence, RI 02912, USA
Institute at Brown for Environment and Society, Brown University,
Providence, RI 02912, USA
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Cited
11 citations as recorded by crossref.
- Nitrate chemistry in the northeast US – Part 1: Nitrogen isotope seasonality tracks nitrate formation chemistry C. Bekker et al. 10.5194/acp-23-4185-2023
- Incorporating Oxygen Isotopes of Oxidized Reactive Nitrogen in the Regional Atmospheric Chemistry Mechanism, version 2 (ICOIN-RACM2) W. Walters et al. 10.5194/gmd-17-4673-2024
- Understanding of enhanced nitrate in fine particles at agricultural sites in summer with high ammonia level J. Kim et al. 10.1016/j.envpol.2024.125596
- Evaluating NOx fate and organic nitrate chemistry from α-pinene oxidation using stable oxygen and nitrogen isotopes W. Walters et al. 10.5194/acp-25-10707-2025
- Long-term trends in inorganic aerosol chemical composition and chemistry at an urban and rural site in the northeastern US H. Kim et al. 10.1016/j.scitotenv.2023.166848
- Diurnal variations in oxygen and nitrogen isotopes of atmospheric nitrogen dioxide and nitrate: implications for tracing NOx oxidation pathways and emission sources S. Albertin et al. 10.5194/acp-24-1361-2024
- Triple oxygen stable isotope analysis of nitrite measured using continuous flow isotope ratio mass spectrometry W. Walters & M. Hastings 10.1016/j.mex.2023.102413
- Modeling the Oxygen Isotope Anomaly (Δ17O) of Reactive Nitrogen in the Community Multiscale Air Quality Model: Insights into Nitrogen Oxide Chemistry in the Northeastern United States W. Walters et al. 10.1021/acsestair.3c00056
- Effects of Regional Transport for the Sources and Formation Mechanism of Nitrate Components in Mount Lu Fog Water H. LI et al. 10.3724/EE.1672-9250.2024.52.005
- Potential influence of ammonia reduction on particulate nitrate concentration in South Korea J. Kim et al. 10.1016/j.jhazmat.2025.138675
- Nitrate chemistry in the northeast US – Part 1: Nitrogen isotope seasonality tracks nitrate formation chemistry C. Bekker et al. 10.5194/acp-23-4185-2023
10 citations as recorded by crossref.
- Nitrate chemistry in the northeast US – Part 1: Nitrogen isotope seasonality tracks nitrate formation chemistry C. Bekker et al. 10.5194/acp-23-4185-2023
- Incorporating Oxygen Isotopes of Oxidized Reactive Nitrogen in the Regional Atmospheric Chemistry Mechanism, version 2 (ICOIN-RACM2) W. Walters et al. 10.5194/gmd-17-4673-2024
- Understanding of enhanced nitrate in fine particles at agricultural sites in summer with high ammonia level J. Kim et al. 10.1016/j.envpol.2024.125596
- Evaluating NOx fate and organic nitrate chemistry from α-pinene oxidation using stable oxygen and nitrogen isotopes W. Walters et al. 10.5194/acp-25-10707-2025
- Long-term trends in inorganic aerosol chemical composition and chemistry at an urban and rural site in the northeastern US H. Kim et al. 10.1016/j.scitotenv.2023.166848
- Diurnal variations in oxygen and nitrogen isotopes of atmospheric nitrogen dioxide and nitrate: implications for tracing NOx oxidation pathways and emission sources S. Albertin et al. 10.5194/acp-24-1361-2024
- Triple oxygen stable isotope analysis of nitrite measured using continuous flow isotope ratio mass spectrometry W. Walters & M. Hastings 10.1016/j.mex.2023.102413
- Modeling the Oxygen Isotope Anomaly (Δ17O) of Reactive Nitrogen in the Community Multiscale Air Quality Model: Insights into Nitrogen Oxide Chemistry in the Northeastern United States W. Walters et al. 10.1021/acsestair.3c00056
- Effects of Regional Transport for the Sources and Formation Mechanism of Nitrate Components in Mount Lu Fog Water H. LI et al. 10.3724/EE.1672-9250.2024.52.005
- Potential influence of ammonia reduction on particulate nitrate concentration in South Korea J. Kim et al. 10.1016/j.jhazmat.2025.138675
Latest update: 14 Oct 2025
Short summary
Atmospheric nitrate has an important impact on human and ecosystem health. We evaluated atmospheric nitrate formation pathways in the northeastern US utilizing oxygen isotope compositions, which indicated a significant difference between the phases of nitrate (i.e., gas vs. particle). Comparing the observations with model simulations indicated that N2O5 hydrolysis chemistry was overpredicted. Our study has important implications for improving atmospheric chemistry model representation.
Atmospheric nitrate has an important impact on human and ecosystem health. We evaluated...
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