Multi-generation OH oxidation as a source for highly oxygenated organic molecules from aromatics

Garmash, Olga; Rissanen, Matti P.; Pullinen, Iida; Schmitt, Sebastian; Kausiala, Oskari; Tillmann, Ralf; Zhao, Defeng; Percival, Carl; Bannan, Thomas J.; Priestley, Michael; Hallquist, Åsa M.; Kleist, Einhard; Kiendler-Scharr, Astrid; Hallquist, Mattias; Berndt, Torsten; McFiggans, Gordon; Wildt, Jürgen; Mentel, Thomas F.; Ehn, Mikael

doi:https://doi.org/10.5194/acp-20-515-2020

Articles | Volume 20, issue 1

Atmos. Chem. Phys., 20, 515–537, 2020

https://doi.org/10.5194/acp-20-515-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Atmos. Chem. Phys., 20, 515–537, 2020

https://doi.org/10.5194/acp-20-515-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 1

Research article 15 Jan 2020

Research article | 15 Jan 2020

Multi-generation OH oxidation as a source for highly oxygenated organic molecules from aromatics

Olga Garmash et al.

Supplement

https://doi.org/10.5194/acp-20-515-2020-supplement

Data sets

Laboratory simulations of benzene oxidation and formation of highly oxygenated organic molecules (HOM) O. Garmash https://doi.org/10.5281/zenodo.3543607

Short summary

Highly oxygenated organic molecules (HOMs) facilitate aerosol formation in the atmosphere. Using NO₃⁻ chemical ionization mass spectrometry we investigated HOM composition and yield in oxidation of aromatic compounds at different reactant concentrations, in the presence of NO_x and seed aerosol. Higher OH concentrations increased HOM yield, suggesting multiple oxidation steps, and affected HOM composition, potentially explaining in part discrepancies in published secondary organic aerosol yields.