Updated ozone absorption cross section will reduce air quality compliance

doi:10.5194/acp-15-13627-2015

GSTDTAP > 地球科学

DOI	10.5194/acp-15-13627-2015
	Updated ozone absorption cross section will reduce air quality compliance
	E. D. Sofen, M. J. Evans, and A. C. Lewis
	2015-12-10
发表期刊	Atmospheric Chemistry and Physics
出版年	2015
英文摘要	Photometric ozone measurements rely upon an accurate value of the ozone absorption cross section at 253.65 nm. This has recently been re-evaluated by Viallon et al. (2015) as 1.8 % smaller than the accepted value (Hearn, 1961) used for the preceding 50 years. Thus, ozone measurements that applied the older cross section systematically underestimate the amount of ozone in air. We correct the reported historical surface data from North America and Europe and find that this modest change in cross section has a significant impact on the number of locations that are out of compliance with air quality regulations if the air quality standards remain the same. We find 18, 23, and 20 % increases in the number of sites that are out of compliance with current US, Canadian, and European ozone air quality health standards for the year 2012. Should the new cross-section value be applied, it would impact attainment of air quality standards and compliance with relevant clean air acts, unless the air quality target values themselves were also changed proportionately. We draw attention to how a small change in gas metrology has a global impact on attainment and compliance with legal air quality standards. We suggest that further laboratory work to evaluate the new cross section is needed and suggest three possible technical and policy responses should the new cross section be adopted.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/287945
专题	地球科学
推荐引用方式 GB/T 7714	E. D. Sofen, M. J. Evans, and A. C. Lewis. Updated ozone absorption cross section will reduce air quality compliance[J]. Atmospheric Chemistry and Physics,2015.
APA	E. D. Sofen, M. J. Evans, and A. C. Lewis.(2015).Updated ozone absorption cross section will reduce air quality compliance.Atmospheric Chemistry and Physics.
MLA	E. D. Sofen, M. J. Evans, and A. C. Lewis."Updated ozone absorption cross section will reduce air quality compliance".Atmospheric Chemistry and Physics (2015).