Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-378
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
01 Jun 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
A new diagnostic for tropospheric ozone production
Peter M. Edwards1 and Mathew J. Evans1,2 1Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
2National Centre for Atmospheric Science, Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
Abstract. Tropospheric ozone is important for the Earth’s climate and air quality. It is produced during the oxidation of organics in the presence of nitrogen oxides. Due to the range of organic species emitted and the chain like nature of their oxidation, this chemistry is complex and understanding the role of different processes (emission, deposition, chemistry) is difficult. We demonstrate a new methodology for diagnosing ozone production based on the processing of bonds contained within emitted molecules, the fate of which is determined by the conservation of spin of the bonding electrons. Using this methodology to diagnose ozone production in the GEOS-Chem chemical transport model, we demonstrate its advantages over the standard diagnostic. We show that the number of bonds emitted, their chemistry and lifetime, and feedbacks on OH are all important in determining the ozone production within the model and its sensitivity to changes. This insight may allow future model-model comparisons to better identify the root causes of model differences.

Citation: Edwards, P. M. and Evans, M. J.: A new diagnostic for tropospheric ozone production, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-378, in review, 2017.
Peter M. Edwards and Mathew J. Evans
Peter M. Edwards and Mathew J. Evans
Peter M. Edwards and Mathew J. Evans

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