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Organic nitrate contribution to the oxidized nitrogen budget at the 2013 Southern Oxidant and Aerosol Study (SOAS)

Teng, Alexander P. and Nguyen, Tran B. and St. Clair, Jason M. and Duffey, Kaitlin and Romer, Paul and Wooldridge, P. Abigail and Olson, Kevin and Gilman, Jessica B. and Lerner, Brian M. and Wild, Robert J. and Ayres, Benjamin and Fry, Juliane L. and Brown, Steven and Allen, H. and de Gouw, Joost and Cohen, Ronald C. and Wennberg, Paul O. (2014) Organic nitrate contribution to the oxidized nitrogen budget at the 2013 Southern Oxidant and Aerosol Study (SOAS). In: 248th American Chemical Society National Meeting & Exposition, August 10-14, 2014, San Francisco, CA. https://resolver.caltech.edu/CaltechAUTHORS:20140814-153811753

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Abstract

Org. nitrates (RONO_2) that are formed from the OH-initiated or NO_3-initiated oxidn. of biogenic alkenes can be important reservoirs and sinks for NO_x (NO + NO_2). Biogenic org. nitrates represent a significant fraction of the total NO_y budget in forested regions. During the 2013 Southern Oxidant and Aerosol Study (SOAS), speciated org. nitrates produced from the oxidn. of isoprene (C_5H_8) and monoterpenes (C_(10)H_(16)) were measured with high temporal resoln. and sensitivity by a time-of-flight chem. ionization mass spectrometer (ToF-CIMS) from a 20 m tower. Both dark and photochem. mechanisms were obsd. to be important for the prodn. of multifunctional org. nitrates at SOAS. The combined vol. mixing ratios of RONO_2 detd. by ToF-CIMS and GC-MS were compared to a thermal-dissocn. laser-induced fluorescence (TD-LIF) measurement of total org. nitrates in the gas and aerosol phase. The mass closure of org. nitrates in the gas-phase and their fractional contributions to the aerosol phase will be presented. The significance of org. nitrates to the overall nitrogen and oxidant budgets at SOAS will be discussed.


Item Type:Conference or Workshop Item (Paper)
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http://www.acs.org/content/acs/en/meetings/fall-2014.htmlOrganizationConference Website
ORCID:
AuthorORCID
Wennberg, Paul O.0000-0002-6126-3854
Additional Information:© 2014 American Chemical Society.
Record Number:CaltechAUTHORS:20140814-153811753
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140814-153811753
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48579
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Aug 2014 04:44
Last Modified:03 Oct 2019 07:05

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