Low-NO atmospheric oxidation pathways in a polluted megacity

Newland, Mike J.; Bryant, Daniel J.; Dunmore, Rachel E.; Bannan, Thomas J.; Acton, W. Joe F.; Langford, Ben; Hopkins, James R.; Squires, Freya A.; Dixon, William; Drysdale, William S.; Ivatt, Peter D.; Evans, Mathew J.; Edwards, Peter M.; Whalley, Lisa K.; Heard, Dwayne E.; Slater, Eloise J.; Woodward-Massey, Robert; Ye, Chunxiang; Mehra, Archit; Worrall, Stephen D.; Bacak, Asan; Coe, Hugh; Percival, Carl J.; Hewitt, C. Nicholas; Lee, James D.; Cui, Tianqu; Surratt, Jason D.; Wang, Xinming; Lewis, Alastair C.; Rickard, Andrew R.; Hamilton, Jacqueline F.

doi:https://doi.org/10.5194/acp-21-1613-2021

Articles | Volume 21, issue 3

https://doi.org/10.5194/acp-21-1613-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

In-depth study of air pollution sources and processes within...

https://doi.org/10.5194/acp-21-1613-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 3

Research article

| Highlight paper

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08 Feb 2021

Research article | Highlight paper |

| 08 Feb 2021

Low-NO atmospheric oxidation pathways in a polluted megacity

Mike J. Newland, Daniel J. Bryant, Rachel E. Dunmore, Thomas J. Bannan, W. Joe F. Acton, Ben Langford, James R. Hopkins, Freya A. Squires, William Dixon, William S. Drysdale, Peter D. Ivatt, Mathew J. Evans, Peter M. Edwards, Lisa K. Whalley, Dwayne E. Heard, Eloise J. Slater, Robert Woodward-Massey, Chunxiang Ye, Archit Mehra, Stephen D. Worrall, Asan Bacak, Hugh Coe, Carl J. Percival, C. Nicholas Hewitt, James D. Lee, Tianqu Cui, Jason D. Surratt, Xinming Wang, Alastair C. Lewis, Andrew R. Rickard, and Jacqueline F. Hamilton

Supplement

https://doi.org/10.5194/acp-21-1613-2021-supplement

Data sets

APHH: Online measurements of VOC mixing ratios using Gas Chromatography with Flame Ionisation Detector (GC-FID) at Indira Gandhi Delhi Technical University for Women (IGDTUW) field site during the DelhiFlux field campaign B. Nelson, J. R. Hopkins, G. Stewart, R. Dunmore, and J. F. Hamilton https://catalogue.ceda.ac.uk/uuid/fae65a63910a44b28a3d91268417b7c3

APHH: O3, CO, NO, NO2, NOy and SO2 measurements made at the Indira Gandhi Delhi Technical University for Women (IGDTUW) site during the pre and post monsoon periods for the DelhiFlux field campaign 2018 W. Drysdale https://catalogue.ceda.ac.uk/uuid/33ba929e3bcd4c08b69871e45a8660aa

APHH: Volatile organic compound (VOC) mixing ratios made at the IAPBeijing site during the summer and winter campaigns J. Acton, N. Hewitt, Z. Huang, and X. Wang https://catalogue.ceda.ac.uk/uuid/de37c54e59a548ccb9f168ee724f3769

APHH: Volatile organic compound (VOC) flux measurements made during the APHH-Beijing field campaigns 11-12/2016 and 05-06/2017 J. Acton, N. Hewitt, Z. Huang, and X. Wang https://catalogue.ceda.ac.uk/uuid/9e11d5cb819a45068921db5ae296fb57

APHH: Fluorescence Assay Gas Expansion measurements of OH, HO2 and RO2 made at the IAPBeijing site during the winter and summer campaigns E. Slater and L. Whalley https://catalogue.ceda.ac.uk/uuid/bb339ff791814fc6a8b9a93d339f5bc1

APHH: Laser induced fluorescence (LIF) OH reactivity measurements made at the IAP-Beijing site during the winter and summer campaigns L. Whalley and E. Slater https://catalogue.ceda.ac.uk/uuid/8ed84f3c770544c49329df9b068ab662

Model code and software

Comparison of tropospheric gas-phase chemistry schemes for use within global models K. M. Emmerson and M. J. Evans https://doi.org/10.5194/acp-9-1831-2009

The tropospheric degradation of volatile organic compounds: a protocol for mechanism development M. E. Jenkin, S. M. Saunders, and M. J. Pilling https://doi.org/10.1016/S1352-2310(96)00105-7

The MCM v3.3.1 degradation scheme for isoprene M. E. Jenkin, J. C. Young, and A. R. Rickard https://doi.org/10.5194/acp-15-11433-2015

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Short summary

We report the formation of secondary pollutants in the urban megacity of Beijing that are typically associated with remote regions such as rainforests. This is caused by extremely low levels of nitric oxide (NO), typically expected to be high in urban areas, observed in the afternoon. This work has significant implications for how we understand atmospheric chemistry in the urban environment and thus for how to implement effective policies to improve urban air quality.