Organic nitrate aerosol formation via NO_3 + biogenic volatile organic compounds in the southeastern United States
Creators
- Ayres, B. R.1
- Allen, H. M.1, 2
- Draper, D. C.1, 3
- Brown, S. S.4
- Wild, R. J.4
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Jimenez, J. L.5, 6
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Day, D. A.5, 6
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Campuzano-Jost, P.5, 6
- Hu, W.5, 6
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de Gouw, J.5, 6
- Koss, A.5, 6
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Cohen, R. C.7
- Duffey, K. C.7
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Romer, P.7
- Baumann, K.8
- Edgerton, E.8
- Takahama, S.9
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Thornton, J. A.10
- Lee, B. H.10
- Lopez-Hilfiker, F. D.10
- Mohr, C.10, 11
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Wennberg, P. O.2
- Nguyen, T. B.2
- Teng, A.2
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Goldstein, A. H.7
- Olson, K.7
- Fry, J. L.1
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1.
Reed College
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2.
California Institute of Technology
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3.
University of California, Irvine
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4.
Earth System Research Laboratory
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5.
Cooperative Institute for Research in Environmental Sciences
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6.
University of Colorado Boulder
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7.
University of California, Berkeley
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8.
Applied Research Associates (United States)
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9.
École Polytechnique Fédérale de Lausanne
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10.
University of Washington
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11.
Karlsruhe Institute of Technology
Abstract
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 (NO_3) reaction with monoterpenes leads to significant secondary aerosol formation. Cumulative losses of NO_3 to terpenes are correlated with increase in gas- and aerosol-organic nitrate concentrations made during the campaign. Correlation of NO_3 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 C_(10)H_(17)NO_5, likely a hydroperoxy nitrate, is a major nitrate-oxidized terpene product being incorporated into aerosols. The comparable isoprene product C_5H_9NO_5 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, HNO_3 uptake produced nitrate aerosol mass loading at a rate comparable to that of organic nitrate produced via NO_3 + BVOCs.
Additional Information
© Author(s) 2015. This work is distributed under the Creative Commons Attribution 3.0 License. Received: 12 May 2015 – Published in Atmos. Chem. Phys. Discuss.: 16 Jun 2015. Revised: 26 Oct 2015 – Accepted: 14 Nov 2015 – Published: 03 Dec 2015. We would like to acknowledge Anne Marie Carlton, Jim Moore and all of the colleagues that helped to set up this study. B. R. Ayres, H. M. Allen, D. C. Draper, and J. L. Fry gratefully acknowledge funding from the National Center for Environmental Research (NCER) STAR Program, EPA no. RD-83539901 and NOAA NA13OAR4310063. D. A. Day, P. Campuzano-Jost, and J. L. Jimenez thank NSF AGS-1243354 and NOAA NA13OAR4310063; R. C. Cohen thanks NSF AGS-1120076 and AGS-1352972.Attached Files
Published - acp-15-13377-2015.pdf
Supplemental Material - acp-15-13377-2015-supplement.pdf
Files
acp-15-13377-2015-supplement.pdf
Additional details
Identifiers
- Eprint ID
- 63701
- Resolver ID
- CaltechAUTHORS:20160115-095029693
Related works
- Describes
- 10.5194/acp-15-13377-2015-supplement (DOI)
Funding
- Environmental Protection Agency (EPA)
- RD-83539901
- National Oceanic and Atmospheric Administration (NOAA)
- NA13OAR4310063
- NSF
- AGS-1243354
- NSF
- AGS-1120076
- NSF
- AGS-1352972
Dates
- Created
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2016-01-19Created from EPrint's datestamp field
- Updated
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2023-06-02Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)