Organic nitrate aerosol formation via NO3 + biogenic volatile organic compounds in the southeastern United States

Ayres, B. R.; Allen, H. M.; Draper, D. C.; Brown, S. S.; Wild, R. J.; Jimenez, J. L.; Day, D. A.; Campuzano-Jost, P.; Hu, W.; de Gouw, J.; Koss, A.; Cohen, R. C.; Duffey, K. C.; Romer, P.; Baumann, K.; Edgerton, E.; Takahama, S.; Thornton, J. A.; Lee, B. H.; Lopez-Hilfiker, F. D.; Mohr, C.; Wennberg, P. O.; Nguyen, T. B.; Teng, A.; Goldstein, A. H.; Olson, K.; Fry, J. L.

doi:10.5194/acp-15-13377-2015

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Organic nitrate aerosol formation via NO3 + biogenic volatile organic compounds in the southeastern United States

2015
By Ayres, B. R. ; Allen, H. M. ; Draper, D. C. ; ...
Source: Atmospheric Chemistry and Physics, 15(23), 13377-13392.

[PDF-2.56 MB]

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Journal Title:

Atmospheric Chemistry and Physics
Personal Author:

Ayres, B. R. ; Allen, H. M. ; Draper, D. C. ; Brown, S. S. ; Wild, R. J. ; ... More +

Ayres, B. R. ; Allen, H. M. ; Draper, D. C. ; Brown, S. S. ; Wild, R. J. ; Jimenez, J. L. ; Day, D. A. ; Campuzano-Jost, P. ; Hu, W. ; de Gouw, J. ; Koss, A. ; Cohen, R. C. ; Duffey, K. C. ; Romer, P. ; Baumann, K. ; Edgerton, E. ; Takahama, S. ; Thornton, J. A. ; Lee, B. H. ; Lopez-Hilfiker, F. D. ; Mohr, C. ; Wennberg, P. O. ; Nguyen, T. B. ; Teng, A. ; Goldstein, A. H. ; Olson, K. ; Fry, J. L. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CSL (Chemical Sciences Laboratory)

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CSL (Chemical Sciences Laboratory) Less -
Description:

Gas- and aerosol-phase measurements of oxidants, biogenic volatile organic compounds (BVOCs) and organic nitrates made during the Southern Oxidant and Aerosol Study (SOAS campaign, Summer 2013) in central Alabama show that a nitrate radical (NO3) reaction with monoterpenes leads to significant secondary aerosol formation. Cumulative losses of NO3 to terpenes are correlated with increase in gas- and aerosol- organic nitrate concentrations made during the campaign. Correlation of NO3 radical consumption to organic nitrate aerosol formation as measured by aerosol mass spectrometry and thermal dissociation laser-induced fluorescence suggests a molar yield of aerosol-phase monoterpene nitrates of 23-44 %. Compounds observed via chemical ionization mass spectrometry (CIMS) are correlated to predicted nitrate loss to BVOCs and show C10H17NO5, likely a hydroperoxy nitrate, is a major nitrate-oxidized terpene product being incorporated into aerosols. The comparable isoprene product C5H9NO5 was observed to contribute less than 1% of the total organic nitrate in the aerosol phase and correlations show that it is principally a gas-phase product from nitrate oxidation of isoprene. Organic nitrates comprise between 30 and 45% of the NOy budget during SOAS. Inorganic nitrates were also monitored and showed that during incidents of increased coarse-mode mineral dust, HNO3 uptake produced nitrate aerosol mass loading at a rate comparable to that of organic nitrate produced via NO3 + BVOCs.
Source:

Atmospheric Chemistry and Physics, 15(23), 13377-13392.
DOI:

https://doi.org/10.5194/acp-15-13377-2015
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Journal Article
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CC BY
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Submitted
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urn:sha256:dc9e2004a371b138835e430e71e19bb97b8d64ddf79b044dd559283d912eba10
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https://repository.library.noaa.gov/view/noaa/22082/noaa_22082_DS1.pdf
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Organic nitrate aerosol formation via NO3 + biogenic volatile organic compounds in the southeastern United States

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