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We measured the three chlorofluorocarbons (CFCs) CFC-13, CFC-114, and CFC-115 in the atmosphere because they are important in stratospheric ozone depletion. These compounds should have decreased in the atmosphere because they are banned by the Montreal Protocol but we find the opposite. Emissions over the last decade have not declined on a global scale. We use inverse modeling and our observations to find that a large part of the emissions originate in the Asian region.
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Articles | Volume 18, issue 2
Atmos. Chem. Phys., 18, 979–1002, 2018
https://doi.org/10.5194/acp-18-979-2018
Atmos. Chem. Phys., 18, 979–1002, 2018
https://doi.org/10.5194/acp-18-979-2018

Research article 25 Jan 2018

Research article | 25 Jan 2018

Atmospheric histories and emissions of chlorofluorocarbons CFC-13 (CClF3), ΣCFC-114 (C2Cl2F4), and CFC-115 (C2ClF5)

Martin K. Vollmer et al.

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Cited articles

Azzali, D. and Basile, G.: Purification process of pentafluoroethane (HFC-125), EP Patent 1 153 907, available at: https://www.google.com/patents/EP1153907B1?cl=un (last access: 6 December 2017), 2004.
Baasandorj, M., Feierabend, K. J., and Burkholder, J. B.: Rate coefficients and ClO radical yields in the reaction of O(1D) with CClF2CCl2F, CCl3CF3, CClF2CClF2, and CCl2FCF3, Int. J. Chem. Kinet., 43, 393–401, https://doi.org/10.1002/kin.20561, 2011.
Baasandorj, M., Fleming, E. L., Jackman, C. H., and Burkholder, J. B.: O(1D) kinetic study of key ozone depleting substances and greenhouse gases, J. Phys. Chem. A, 117, 2434–2445, https://doi.org/10.1021/jp312781c, 2013.
Banks, R. E. and Sharratt, P. N.: Environmental Impacts of the Manufacture of HFC-134a, Tech. rep., Department of Chemistry and Department of Chemical Engineering, UMIST, Manchester, 1996.
Brandstater, S. M., Cohn, M., Hedrick, V. E., and Iikubo, Y.: Processes for purification and production of fluorocarbons, US Patent App. 10/075 560, available at: https://www.google.ch/patents/US20030164283 (last access: 6 December 2017), 2003.
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Short summary
We measured the three chlorofluorocarbons (CFCs) CFC-13, CFC-114, and CFC-115 in the atmosphere because they are important in stratospheric ozone depletion. These compounds should have decreased in the atmosphere because they are banned by the Montreal Protocol but we find the opposite. Emissions over the last decade have not declined on a global scale. We use inverse modeling and our observations to find that a large part of the emissions originate in the Asian region.
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