Abundance of NO 3 Derived Organo-Nitrates and Their Importance in the Atmosphere
AuthorsFoulds, Amy; email: email@example.com
Khan, M. Anwar H.; orcid: 0000-0001-7836-3344; email: firstname.lastname@example.org
Bannan, Thomas J.; orcid: 0000-0002-1760-6522; email: Thomas.email@example.com
Percival, Carl J.; email: firstname.lastname@example.org
Lowenberg, Mark H.; orcid: 0000-0002-1373-8237; email: email@example.com
Shallcross, Dudley E.; email: firstname.lastname@example.org
MetadataShow full item record
AbstractThe chemistry of the nitrate radical and its contribution to organo-nitrate formation in the troposphere has been investigated using a mesoscale 3-D chemistry and transport model, WRF-Chem-CRI. The model-measurement comparisons of NO2, ozone and night-time N2O5 mixing ratios show good agreement supporting the model’s ability to represent nitrate (NO3) chemistry reasonably. Thirty-nine organo-nitrates in the model are formed exclusively either from the reaction of RO2 with NO or by the reaction of NO3 with alkenes. Temporal analysis highlighted a significant contribution of NO3-derived organo-nitrates, even during daylight hours. Night-time NO3-derived organo-nitrates were found to be 3-fold higher than that in the daytime. The reactivity of daytime NO3 could be more competitive than previously thought, with losses due to reaction with VOCs (and subsequent organo-nitrate formation) likely to be just as important as photolysis. This has highlighted the significance of NO3 in daytime organo-nitrate formation, with potential implications for air quality, climate and human health. Estimated atmospheric lifetimes of organo-nitrates showed that the organo-nitrates act as NOx reservoirs, with particularly short-lived species impacting on air quality as contributors to downwind ozone formation.
CitationAtmosphere, volume 12, issue 11, page e1381
DescriptionFrom MDPI via Jisc Publications Router
History: accepted 2021-10-20, pub-electronic 2021-10-22
Publication status: Published
Funder: Natural Environment Research Council; Grant(s): NE/K004905/1
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