Abundance of NO3 Derived Organo-Nitrates and Their Importance in the Atmosphere

The 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 N2</su...

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Autores principales:	Amy Foulds, M. Anwar H. Khan, Thomas J. Bannan, Carl J. Percival, Mark H. Lowenberg, Dudley E. Shallcross
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	organo-nitrates atmospheric lifetime ozone secondary organic aerosol air quality Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/a6ff8576f5974affb2a29aa440cf732a
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spelling	oai:doaj.org-article:a6ff8576f5974affb2a29aa440cf732a2021-11-25T16:43:56ZAbundance of NO<sub>3</sub> Derived Organo-Nitrates and Their Importance in the Atmosphere10.3390/atmos121113812073-4433https://doaj.org/article/a6ff8576f5974affb2a29aa440cf732a2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4433/12/11/1381https://doaj.org/toc/2073-4433The 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 NO<sub>2</sub>, ozone and night-time N<sub>2</sub>O<sub>5</sub> mixing ratios show good agreement supporting the model’s ability to represent nitrate (NO<sub>3</sub>) chemistry reasonably. Thirty-nine organo-nitrates in the model are formed exclusively either from the reaction of RO<sub>2</sub> with NO or by the reaction of NO<sub>3</sub> with alkenes. Temporal analysis highlighted a significant contribution of NO<sub>3</sub>-derived organo-nitrates, even during daylight hours. Night-time NO<sub>3</sub>-derived organo-nitrates were found to be 3-fold higher than that in the daytime. The reactivity of daytime NO<sub>3</sub> 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 NO<sub>3</sub> 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 NO<sub>x</sub> reservoirs, with particularly short-lived species impacting on air quality as contributors to downwind ozone formation.Amy FouldsM. Anwar H. KhanThomas J. BannanCarl J. PercivalMark H. LowenbergDudley E. ShallcrossMDPI AGarticleorgano-nitratesatmospheric lifetimeozonesecondary organic aerosolair qualityMeteorology. ClimatologyQC851-999ENAtmosphere, Vol 12, Iss 1381, p 1381 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	organo-nitrates atmospheric lifetime ozone secondary organic aerosol air quality Meteorology. Climatology QC851-999
spellingShingle	organo-nitrates atmospheric lifetime ozone secondary organic aerosol air quality Meteorology. Climatology QC851-999 Amy Foulds M. Anwar H. Khan Thomas J. Bannan Carl J. Percival Mark H. Lowenberg Dudley E. Shallcross Abundance of NO<sub>3</sub> Derived Organo-Nitrates and Their Importance in the Atmosphere
description	The 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 NO<sub>2</sub>, ozone and night-time N<sub>2</sub>O<sub>5</sub> mixing ratios show good agreement supporting the model’s ability to represent nitrate (NO<sub>3</sub>) chemistry reasonably. Thirty-nine organo-nitrates in the model are formed exclusively either from the reaction of RO<sub>2</sub> with NO or by the reaction of NO<sub>3</sub> with alkenes. Temporal analysis highlighted a significant contribution of NO<sub>3</sub>-derived organo-nitrates, even during daylight hours. Night-time NO<sub>3</sub>-derived organo-nitrates were found to be 3-fold higher than that in the daytime. The reactivity of daytime NO<sub>3</sub> 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 NO<sub>3</sub> 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 NO<sub>x</sub> reservoirs, with particularly short-lived species impacting on air quality as contributors to downwind ozone formation.
format	article
author	Amy Foulds M. Anwar H. Khan Thomas J. Bannan Carl J. Percival Mark H. Lowenberg Dudley E. Shallcross
author_facet	Amy Foulds M. Anwar H. Khan Thomas J. Bannan Carl J. Percival Mark H. Lowenberg Dudley E. Shallcross
author_sort	Amy Foulds
title	Abundance of NO<sub>3</sub> Derived Organo-Nitrates and Their Importance in the Atmosphere
title_short	Abundance of NO<sub>3</sub> Derived Organo-Nitrates and Their Importance in the Atmosphere
title_full	Abundance of NO<sub>3</sub> Derived Organo-Nitrates and Their Importance in the Atmosphere
title_fullStr	Abundance of NO<sub>3</sub> Derived Organo-Nitrates and Their Importance in the Atmosphere
title_full_unstemmed	Abundance of NO<sub>3</sub> Derived Organo-Nitrates and Their Importance in the Atmosphere
title_sort	abundance of no<sub>3</sub> derived organo-nitrates and their importance in the atmosphere
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a6ff8576f5974affb2a29aa440cf732a
work_keys_str_mv	AT amyfoulds abundanceofnosub3subderivedorganonitratesandtheirimportanceintheatmosphere AT manwarhkhan abundanceofnosub3subderivedorganonitratesandtheirimportanceintheatmosphere AT thomasjbannan abundanceofnosub3subderivedorganonitratesandtheirimportanceintheatmosphere AT carljpercival abundanceofnosub3subderivedorganonitratesandtheirimportanceintheatmosphere AT markhlowenberg abundanceofnosub3subderivedorganonitratesandtheirimportanceintheatmosphere AT dudleyeshallcross abundanceofnosub3subderivedorganonitratesandtheirimportanceintheatmosphere
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Abundance of NO<sub>3</sub> Derived Organo-Nitrates and Their Importance in the Atmosphere

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