Articles | Volume 23, issue 10
https://doi.org/10.5194/acp-23-5801-2023
https://doi.org/10.5194/acp-23-5801-2023
Research article
 | 
24 May 2023
Research article |  | 24 May 2023

Large simulated future changes in the nitrate radical under the CMIP6 SSP scenarios: implications for oxidation chemistry

Scott Archer-Nicholls, Rachel Allen, Nathan L. Abraham, Paul T. Griffiths, and Alex T. Archibald

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Cited articles

Archer-Nicholls, S., Abraham, N. L., Shin, Y. M., Weber, J., Russo, M. R., Lowe, D., Utembe, S. R., O'Connor, F. M., Kerridge, B., Latter, B., Siddans, R., Jenkin, M., Wild, O., and Archibald, A. T.: The Common Representative Intermediates Mechanism Version 2 in the United Kingdom Chemistry and Aerosols Model, J. Adv. Model. Earth Sy., 13, 1–37, https://doi.org/10.1029/2020MS002420, 2021. 
Archer-Nicholls, S., Allen, R., Shin, Y., Abraham, N. L., Griffiths, P., and Archibald, A.: UKESM1 diagnostics for CMIP6 ScenarioMIP and CMIP historical experiments, NERC EDS Centre for Environmental Data Analysis [data set], https://doi.org/10.5285/b70e6ae10a9f463d88819eb981cd4d0f, 2023. 
Archibald, A. T., Neu, J. L., Elshorbany, Y. F., Cooper, O. R., Young, P. J., Akiyoshi, H., Cox, R. A., Coyle, M., Derwent, R. G., Deushi, M., and Finco, A.: Tropospheric Ozone Assessment Report: A critical review of changes in the tropospheric ozone burden and budget from 1850 to 2100, Elementa: Science of the Anthropocene, 8, 1–53, https://doi.org/10.1525/elementa.2020.034, 2020a. 
Arneth, A., Niinemets, Ü., Pressley, S., Bäck, J., Hari, P., Karl, T., Noe, S., Prentice, I. C., Serça, D., Hickler, T., Wolf, A., and Smith, B.: Process-based estimates of terrestrial ecosystem isoprene emissions: incorporating the effects of a direct CO2−isoprene interaction, Atmos. Chem. Phys., 7, 31–53, https://doi.org/10.5194/acp-7-31-2007, 2007. 
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Short summary
The nitrate radical is a major oxidant at nighttime, but much less is known about it than about the other oxidants ozone and OH. We use Earth system model calculations to show how the nitrate radical has changed in abundance from 1850–2014 and to 2100 under a range of different climate and emission scenarios. Depending on the emissions and climate scenario, significant increases are projected with implications for the oxidation of volatile organic compounds and the formation of fine aerosol.
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