Daytime isoprene nitrates under changing NOx and O3
-
Published:2023-07-31
Issue:14
Volume:23
Page:8473-8485
-
ISSN:1680-7324
-
Container-title:Atmospheric Chemistry and Physics
-
language:en
-
Short-container-title:Atmos. Chem. Phys.
Author:
Mayhew Alfred W.ORCID, Edwards Peter M.ORCID, Hamilton Jaqueline F.
Abstract
Abstract. Organonitrates are important species in the atmosphere due to their impacts on NOx, HOx, and O3 budgets, and their potential to contribute to secondary organic aerosol (SOA) mass. This work presents a steady-state modelling approach to assess the impacts of changes in NOx and O3 concentrations on the organonitrates produced from
isoprene oxidation. The diverse formation pathways to isoprene organonitrates dictate the responses of different groups of organonitrates
to changes in O3 and NOx. For example, organonitrates predominantly formed from the OH-initiated oxidation of isoprene favour
formation under lower-ozone and moderate-NOx concentrations, whereas
organonitrates formed via daytime NO3 oxidation show the highest
formation under high-O3 concentrations with little dependence on
NOx concentrations. Investigating the response of total organonitrates
reveals complex and nonlinear behaviour with implications that could inform
expectations of changes to organonitrate concentrations as efforts are made
to reduce NOx and O3 concentrations, including a region of
NOx–O3 space where total organonitrate concentration is relatively insensitive to changes in NOx and O3. These conclusions are further contextualised by estimating the volatility of the isoprene organonitrates revealing the potential for high concentrations of low-volatility species under high-ozone conditions.
Funder
Natural Environment Research Council
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference51 articles.
1. AtChem: Popular repositories, GitHub [code], https://github.com/AtChem (last access: 21 February 2023), 2023. 2. Barley, M. H. and McFiggans, G.: The critical assessment of vapour pressure estimation methods for use in modelling the formation of atmospheric organic aerosol, Atmos. Chem. Phys., 10, 749–767, https://doi.org/10.5194/acp-10-749-2010, 2010. 3. Bates, K. H. and Jacob, D. J.: A new model mechanism for atmospheric oxidation of isoprene: global effects on oxidants, nitrogen oxides, organic products, and secondary organic aerosol, Atmos. Chem. Phys., 19, 9613–9640, https://doi.org/10.5194/acp-19-9613-2019, 2019. 4. Bianchi, F., Kurtén, T., Riva, M., Mohr, C., Rissanen, M. P., Roldin,
P., Berndt, T., Crounse, J. D., Wennberg, P. O., Mentel, T. F., Wildt, J.,
Junninen, H., Jokinen, T., Kulmala, M., Worsnop, D. R., Thornton, J. A.,
Donahue, N., Kjaergaard, H. G., and Ehn, M.: Highly Oxygenated Organic
Molecules (HOM) from Gas-Phase Autoxidation Involving Peroxy Radicals: A Key
Contributor to Atmospheric Aerosol, Chem. Rev., 119, 3472–3509,
https://doi.org/10.1021/acs.chemrev.8b00395, 2019. 5. Brown, S. S., Osthoff, H. D., Stark, H., Dubé, W. P., Ryerson, T. B.,
Warneke, C., de Gouw, J. A., Wollny, A. G., Parrish, D. D., Fehsenfeld, F.
C., and Ravishankara, A. R.: Aircraft observations of daytime NO3 and N2O5
and their implications for tropospheric chemistry, J. Photoch. Photobio. A, 176, 270–278,
https://doi.org/10.1016/j.jphotochem.2005.10.004, 2005.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|