Articles | Volume 21, issue 12
https://doi.org/10.5194/acp-21-9669-2021
https://doi.org/10.5194/acp-21-9669-2021
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29 Jun 2021
Research article | Highlight paper |  | 29 Jun 2021

Investigations on the anthropogenic reversal of the natural ozone gradient between northern and southern midlatitudes

David D. Parrish, Richard G. Derwent, Steven T. Turnock, Fiona M. O'Connor, Johannes Staehelin, Susanne E. Bauer, Makoto Deushi, Naga Oshima, Kostas Tsigaridis, Tongwen Wu, and Jie Zhang

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Cited articles

Bevington, P. R. and Robinson, D. K.: Data Reduction and Error Analysis for the Physical Sciences, 3rd Ed., McGraw-Hill Higher Education, New York, NY, 2003. 
Collins, W. J., Stevenson, D. S., Johnson, C. E., and Derwent, R. G.: Tropospheric ozone in a global-scale three-dimensional Lagrangian model and its response to NOx emission controls, J. Atmos. Chem., 26, 223–274, 1997. 
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The few ozone measurements made before the 1980s indicate that industrial development increased ozone concentrations by a factor of ~ 2 at northern midlatitudes, which are now larger than at southern midlatitudes. This difference was much smaller, and likely reversed, in the pre-industrial atmosphere. Earth system models find similar increases, but not higher pre-industrial ozone in the south. This disagreement may indicate that modeled natural ozone sources and/or deposition loss are inadequate.
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