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

ACP | 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.

ACP | 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.

Highly oxygenated organic molecules (HOMs) facilitate aerosol formation in the atmosphere. Using...