Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 43, Issue 14, Pages 7735-7744Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL069239
Keywords
organic nitrate; particulate matter; field study
Categories
Funding
- European Commission through EUCAARI IP [036833-2]
- PEGASOS [FP7-ENV-2010-265148]
- ACCENT
- UK Department for Environment, Food and Rural Affairs (Defra)
- German Federal Environment Agency (Umweltbundesamt) [351 03 031, 351 01 038]
- German Federal Environment Agency (UFOPLAN) [3703 43 200]
- Swiss Federal Office for the Environment
- NOAA [NA13OAR4310063, EPA STAR 83587701-0]
- NERC [ncas10006, ceh020001] Funding Source: UKRI
- Natural Environment Research Council [ncas10006, ceh020001] Funding Source: researchfish
- Directorate For Geosciences
- Div Atmospheric & Geospace Sciences [1360834] Funding Source: National Science Foundation
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In the atmosphere nighttime removal of volatile organic compounds is initiated to a large extent by reaction with the nitrate radical (NO3) forming organic nitrates which partition between gas and particulate phase. Here we show based on particle phase measurements performed at a suburban site in the Netherlands that organic nitrates contribute substantially to particulate nitrate and organic mass. Comparisons with a chemistry transport model indicate that most of the measured particulate organic nitrates are formed by NO3 oxidation. Using aerosol composition data from three intensive observation periods at numerous measurement sites across Europe, we conclude that organic nitrates are a considerable fraction of fine particulate matter (PM1) at the continental scale. Organic nitrates represent 34% to 44% of measured submicron aerosol nitrate and are found at all urban and rural sites, implying a substantial potential of PM reduction by NOx emission control.
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