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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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ACP | Articles | Volume 18, issue 16
Atmos. Chem. Phys., 18, 12123–12140, 2018
https://doi.org/10.5194/acp-18-12123-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Global and regional assessment of intercontinental transport...

Atmos. Chem. Phys., 18, 12123–12140, 2018
https://doi.org/10.5194/acp-18-12123-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 22 Aug 2018

Research article | 22 Aug 2018

Average versus high surface ozone levels over the continental USA: model bias, background influences, and interannual variability

Jean J. Guo et al.

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AR by Lorena Grabowski on behalf of the Authors (19 Jun 2018)  Author's response
ED: Referee Nomination & Report Request started (27 Jun 2018) by Frank Dentener
RR by Anonymous Referee #2 (27 Jun 2018)
ED: Publish as is (02 Jul 2018) by Frank Dentener
Publications Copernicus
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Short summary
We use the GEOS-Chem model to estimate the influence from anthropogenic and background sources to ozone over the USA. Novel findings include the point that year-to-year background variability on the 10 highest observed ozone days is driven mainly by natural sources and not international or intercontinental pollution transport. High positive model biases during summer are associated with regional ozone production. The EPA 3-year average metric falls short of its aim to remove natural variability.
We use the GEOS-Chem model to estimate the influence from anthropogenic and background sources...
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