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Published August 2014 | public
Conference Paper

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

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.

Additional Information

© 2014 American Chemical Society.

Additional details

Created:
August 22, 2023
Modified:
October 17, 2023