Articles | Volume 15, issue 23
Research article
 | Highlight paper
10 Dec 2015
Research article | Highlight paper |  | 10 Dec 2015

Updated ozone absorption cross section will reduce air quality compliance

E. D. Sofen, M. J. Evans, and A. C. Lewis

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Cited articles

Bell, J. N. B. and Treshow, M. (Eds.): Air Pollution and Plant Life, 2nd Edn., John Wiley & Sons Ltd., Chichester, UK, 2002.
Bell, M. L., McDermott, A., Zeger, S. L., Samet, J. M., and Dominici, F.: Ozone and short-term mortality in 95 US urban communities, 1987–2000, JAMA-J. Am. Med. Assoc., 292, 2372–2378,, 2004.
CAN (Canadian Council of Ministers of the Environment): Guidance Document on the Achievement Determination Canadian Ambient Air Quality Standards for Fine Particulate Matter and Ozone, Canadian Council of Ministers of the Environment, Winnipeg, Manitoba, Canada, 2012.
Cooper, O., Parrish, D. D., Ziemke, J., Balashov, N. V., Cupeiro, M., Galbally, I. E., Gilge, S., Horowitz, L., Jensen, N. R., Lamarque, J.-F., Naik, V., Oltmans, S. J., Schwab, J., Shindell, D. T., Thompson, A. M., Thouret, V., Wang, Y., and Zbinden, R. M.: Global distribution and trends of tropospheric ozone: an observation-based review, Elementa: Science of the Anthropocene, 2, 000029,, 2014.
EEA (European Environment Agency): Directive 2002/3/EC of the European Parliament and of the Council of 12 February 2002 relating to ozone in ambient air, in: Official Journal of the European Communities, Luxembourg, p. L67/14, 2002.
Short summary
As an air pollutant, O3 is monitored photometrically to assess compliance with air quality legislation. A recent study found a 1.8% reduction in its absorption cross section, which would lead to an equivalent increase in observed O3 concentrations. We estimate this would increase the number of sites out of compliance with air quality regulations in the EU and US by 20%. We draw attention to how small changes in gas metrology impacts attainment and compliance with legal air quality standards.
Final-revised paper