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Low-NO atmospheric oxidation pathways in a polluted megacity

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Low-NO atmospheric oxidation pathways in a polluted megacity. / Newland, M.J.; Bryant, D.J.; Dunmore, R.E.; Bannan, T.J.; Joe F. Acton, W.; Langford, B.; Hopkins, J.R.; Squires, F.A.; Dixon, W.; Drysdale, W.S.; Ivatt, P.D.; Evans, M.J.; Edwards, P.M.; Whalley, L.K.; Heard, D.E.; Slater, E.J.; Woodward-Massey, R.; Ye, C.; Mehra, A.; Worrall, S.D.; Bacak, A.; Coe, H.; Percival, C.J.; Nicholas Hewitt, C.; Lee, J.D.; Cui, T.; Surratt, J.D.; Wang, X.; Lewis, A.C.; Rickard, A.R.; Hamilton, J.F.

In: Atmospheric Chemistry and Physics , Vol. 21, No. 3, 08.02.2021, p. 1613-1625.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Newland, MJ, Bryant, DJ, Dunmore, RE, Bannan, TJ, Joe F. Acton, W, Langford, B, Hopkins, JR, Squires, FA, Dixon, W, Drysdale, WS, Ivatt, PD, Evans, MJ, Edwards, PM, Whalley, LK, Heard, DE, Slater, EJ, Woodward-Massey, R, Ye, C, Mehra, A, Worrall, SD, Bacak, A, Coe, H, Percival, CJ, Nicholas Hewitt, C, Lee, JD, Cui, T, Surratt, JD, Wang, X, Lewis, AC, Rickard, AR & Hamilton, JF 2021, 'Low-NO atmospheric oxidation pathways in a polluted megacity', Atmospheric Chemistry and Physics , vol. 21, no. 3, pp. 1613-1625. https://doi.org/10.5194/acp-21-1613-2021

APA

Newland, M. J., Bryant, D. J., Dunmore, R. E., Bannan, T. J., Joe F. Acton, W., Langford, B., Hopkins, J. R., Squires, F. A., Dixon, W., Drysdale, W. S., Ivatt, P. D., Evans, M. J., Edwards, P. M., Whalley, L. K., Heard, D. E., Slater, E. J., Woodward-Massey, R., Ye, C., Mehra, A., ... Hamilton, J. F. (2021). Low-NO atmospheric oxidation pathways in a polluted megacity. Atmospheric Chemistry and Physics , 21(3), 1613-1625. https://doi.org/10.5194/acp-21-1613-2021

Vancouver

Newland MJ, Bryant DJ, Dunmore RE, Bannan TJ, Joe F. Acton W, Langford B et al. Low-NO atmospheric oxidation pathways in a polluted megacity. Atmospheric Chemistry and Physics . 2021 Feb 8;21(3):1613-1625. https://doi.org/10.5194/acp-21-1613-2021

Author

Newland, M.J. ; Bryant, D.J. ; Dunmore, R.E. ; Bannan, T.J. ; Joe F. Acton, W. ; Langford, B. ; Hopkins, J.R. ; Squires, F.A. ; Dixon, W. ; Drysdale, W.S. ; Ivatt, P.D. ; Evans, M.J. ; Edwards, P.M. ; Whalley, L.K. ; Heard, D.E. ; Slater, E.J. ; Woodward-Massey, R. ; Ye, C. ; Mehra, A. ; Worrall, S.D. ; Bacak, A. ; Coe, H. ; Percival, C.J. ; Nicholas Hewitt, C. ; Lee, J.D. ; Cui, T. ; Surratt, J.D. ; Wang, X. ; Lewis, A.C. ; Rickard, A.R. ; Hamilton, J.F. / Low-NO atmospheric oxidation pathways in a polluted megacity. In: Atmospheric Chemistry and Physics . 2021 ; Vol. 21, No. 3. pp. 1613-1625.

Bibtex

@article{4234e2919acc4958b9550750f4d2fc50,
title = "Low-NO atmospheric oxidation pathways in a polluted megacity",
abstract = "The impact of emissions of volatile organic compounds (VOCs) to the atmosphere on the production of secondary pollutants, such as ozone and secondary organic aerosol (SOA), is mediated by the concentration of nitric oxide (NO). Polluted urban atmospheres are typically considered to be {"}high-NO{"}environments, while remote regions such as rainforests, with minimal anthropogenic influences, are considered to be {"}low NO{"}. However, our observations from central Beijing show that this simplistic separation of regimes is flawed. Despite being in one of the largest megacities in the world, we observe formation of gas- and aerosol-phase oxidation products usually associated with low-NO {"}rainforest-like{"}atmospheric oxidation pathways during the afternoon, caused by extreme suppression of NO concentrations at this time. Box model calculations suggest that during the morning high-NO chemistry predominates (95 %) but in the afternoon low-NO chemistry plays a greater role (30 %). Current emissions inventories are applied in the GEOS-Chem model which shows that such models, when run at the regional scale, fail to accurately predict such an extreme diurnal cycle in the NO concentration. With increasing global emphasis on reducing air pollution, it is crucial for the modelling tools used to develop urban air quality policy to be able to accurately represent such extreme diurnal variations in NO to accurately predict the formation of pollutants such as SOA and ozone. ",
author = "M.J. Newland and D.J. Bryant and R.E. Dunmore and T.J. Bannan and {Joe F. Acton}, W. and B. Langford and J.R. Hopkins and F.A. Squires and W. Dixon and W.S. Drysdale and P.D. Ivatt and M.J. Evans and P.M. Edwards and L.K. Whalley and D.E. Heard and E.J. Slater and R. Woodward-Massey and C. Ye and A. Mehra and S.D. Worrall and A. Bacak and H. Coe and C.J. Percival and {Nicholas Hewitt}, C. and J.D. Lee and T. Cui and J.D. Surratt and X. Wang and A.C. Lewis and A.R. Rickard and J.F. Hamilton",
year = "2021",
month = feb,
day = "8",
doi = "10.5194/acp-21-1613-2021",
language = "English",
volume = "21",
pages = "1613--1625",
journal = "Atmospheric Chemistry and Physics ",
issn = "1680-7316",
publisher = "Copernicus GmbH (Copernicus Publications) on behalf of the European Geosciences Union (EGU)",
number = "3",

}

RIS

TY - JOUR

T1 - Low-NO atmospheric oxidation pathways in a polluted megacity

AU - Newland, M.J.

AU - Bryant, D.J.

AU - Dunmore, R.E.

AU - Bannan, T.J.

AU - Joe F. Acton, W.

AU - Langford, B.

AU - Hopkins, J.R.

AU - Squires, F.A.

AU - Dixon, W.

AU - Drysdale, W.S.

AU - Ivatt, P.D.

AU - Evans, M.J.

AU - Edwards, P.M.

AU - Whalley, L.K.

AU - Heard, D.E.

AU - Slater, E.J.

AU - Woodward-Massey, R.

AU - Ye, C.

AU - Mehra, A.

AU - Worrall, S.D.

AU - Bacak, A.

AU - Coe, H.

AU - Percival, C.J.

AU - Nicholas Hewitt, C.

AU - Lee, J.D.

AU - Cui, T.

AU - Surratt, J.D.

AU - Wang, X.

AU - Lewis, A.C.

AU - Rickard, A.R.

AU - Hamilton, J.F.

PY - 2021/2/8

Y1 - 2021/2/8

N2 - The impact of emissions of volatile organic compounds (VOCs) to the atmosphere on the production of secondary pollutants, such as ozone and secondary organic aerosol (SOA), is mediated by the concentration of nitric oxide (NO). Polluted urban atmospheres are typically considered to be "high-NO"environments, while remote regions such as rainforests, with minimal anthropogenic influences, are considered to be "low NO". However, our observations from central Beijing show that this simplistic separation of regimes is flawed. Despite being in one of the largest megacities in the world, we observe formation of gas- and aerosol-phase oxidation products usually associated with low-NO "rainforest-like"atmospheric oxidation pathways during the afternoon, caused by extreme suppression of NO concentrations at this time. Box model calculations suggest that during the morning high-NO chemistry predominates (95 %) but in the afternoon low-NO chemistry plays a greater role (30 %). Current emissions inventories are applied in the GEOS-Chem model which shows that such models, when run at the regional scale, fail to accurately predict such an extreme diurnal cycle in the NO concentration. With increasing global emphasis on reducing air pollution, it is crucial for the modelling tools used to develop urban air quality policy to be able to accurately represent such extreme diurnal variations in NO to accurately predict the formation of pollutants such as SOA and ozone.

AB - The impact of emissions of volatile organic compounds (VOCs) to the atmosphere on the production of secondary pollutants, such as ozone and secondary organic aerosol (SOA), is mediated by the concentration of nitric oxide (NO). Polluted urban atmospheres are typically considered to be "high-NO"environments, while remote regions such as rainforests, with minimal anthropogenic influences, are considered to be "low NO". However, our observations from central Beijing show that this simplistic separation of regimes is flawed. Despite being in one of the largest megacities in the world, we observe formation of gas- and aerosol-phase oxidation products usually associated with low-NO "rainforest-like"atmospheric oxidation pathways during the afternoon, caused by extreme suppression of NO concentrations at this time. Box model calculations suggest that during the morning high-NO chemistry predominates (95 %) but in the afternoon low-NO chemistry plays a greater role (30 %). Current emissions inventories are applied in the GEOS-Chem model which shows that such models, when run at the regional scale, fail to accurately predict such an extreme diurnal cycle in the NO concentration. With increasing global emphasis on reducing air pollution, it is crucial for the modelling tools used to develop urban air quality policy to be able to accurately represent such extreme diurnal variations in NO to accurately predict the formation of pollutants such as SOA and ozone.

U2 - 10.5194/acp-21-1613-2021

DO - 10.5194/acp-21-1613-2021

M3 - Journal article

VL - 21

SP - 1613

EP - 1625

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 3

ER -