A four carbon organonitrate as a significant product of secondary isoprene chemistry

SND-ID: 2021-330

Creator/Principal investigator(s)

Epameinondas Tsiligiannis - University of Gothenburg, Department of Chemistry and Molecular Biology orcid

Mattias Hallquist - University of Gothenburg, Department of Chemistry and Molecular Biology orcid

Description

Oxidation of isoprene by nitrate radicals (NO3) or by hydroxyl radicals (OH) under high NOx conditions forms a substantial amount of organonitrates (ONs). ONs impact NOx concentrations and consequently ozone formation while also contributing to secondary organic aerosol. Here we show that the ONs with the chemical formula C4H7NO5 are a significant fraction of isoprene-derived ONs, based on chamber experiments and ambient measurements from different sites around the globe. From chamber experiments we found that C4H7NO5 isomers contribute 5-17% of all ONs formed during nighttime and constitute more than 40% of the ONs after further daytime oxidation. In ambient measurements C4H7NO5 isomers usually dominate both nighttime and daytime, implying a long residence time compared to C5 ONs which are removed more rapidly. We propose potential nighttime sources and secondary formation pathways, and test them using a box model with an updated isoprene oxidation scheme.

Language

English

Research principal, contributors, and funding

Research principal

University of Gothenburg

Responsible department/unit

Department of Chemistry and Molecular Biology

Protection and ethical review

Data contains personal data

No

Method and time period

Time period(s) investigated

2013 – 2019

Geographic coverage

Geographic spread

Geographic location: Sweden, Brazil, Hong Kong, China, Germany

Geographic description: The ambient data are indicated by the location where they collected (e.g. Amazon). The exact locations are: "Gbg" = Gothenburg city’s port, Sweden. "Jülich" = Forschungszentrum Jülich (FZJ), Germany. "Changping" = 40km north-east of downtown Beijing, China close to Changping town. "HK" = Hok Tsui Tsuen area, south-east on the Hong Kong island, China. "Amazon" = Central Amazonia, at a site located 60 km northwest of Manaus, Brazil (0.235680° S, 60.12560° W, 110 m above sea level) facing a huge area (1600 km2) of nearly pristine forest to the east.

Publications

Epameinondas Tsiligiannis, Rongrong Wu, Ben H. Lee, Christian Mark Garcia Salvador, Michael Priestley, Philip T.M. Carlsson, Sungah Kang, Anna Novelli, Luc Vereecken, Hendrik Fuchs, Alfred W. Mayhew, Jacqueline F. Hamilton, Peter M. Edwards, Juliane L. Fry, Bellamy Brownwood, Steven S. Brown, Robert J Wild, Thomas J. Bannan, Hugh Coe, James Allan, Jason D. Surrat, Asan Bacak, Paul Artaxo, Carl Percival, Song Guo, Min Hu, Tao Wang, Thomas F. Mentel, Joel A. Thornton, and Mattias Hallquist. (2021). A four carbon organonitrate as a significant product of secondary isoprene chemistry (submitted manuscript).
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Dataset
A four carbon organonitrate as a significant product of secondary isoprene chemistry

Description

This dataset is based on oxidation experiments of isoprene + NO3 radicals at the atmospheric chamber SAPHIR, in Jülich, Germany and ambient data from five different locations. More specifically, this dataset is provided in order for users to be able to replicate the results from the Tsiligiannis et al. publication. It includes time-series of gaseous species.

The files called I-CIMS contain compounds that measured using a chemical ionization mass spectrometer (CIMS) with iodide as the reagent io

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Version 1

Citation

Mattias Hallquist, Epameinondas Tsiligiannis. University of Gothenburg (2021). A four carbon organonitrate as a significant product of secondary isoprene chemistry. Swedish National Data Service. Version 1. https://doi.org/10.5878/wfv9-a491

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Data format / data structure

Numeric

Creator/Principal investigator(s)

Mattias Hallquist - University of Gothenburg, Department of Chemistry and Molecular Biology orcid

Epameinondas Tsiligiannis - University of Gothenburg, Department of Chemistry and Molecular Biology orcid

Published: 2021-12-06