Delay in recovery of the Antarctic ozone hole from unexpected CFC-11 emissions

Dhomse, S. S. and Feng, W. and Montzka, S. A. and Hossaini, R. and Keeble, J. and Pyle, J. A. and Daniel, J. S. and Chipperfield, M. P. (2019) Delay in recovery of the Antarctic ozone hole from unexpected CFC-11 emissions. Nature Communications, 10. ISSN 2041-1723

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Abstract

The Antarctic ozone hole is decreasing in size but this recovery will be affected by atmospheric variability and any unexpected changes in chlorinated source gas emissions. Here, using model simulations, we show that the ozone hole will largely cease to occur by 2065 given compliance with the Montreal Protocol. If the unusual meteorology of 2002 is repeated, an ozone-hole-free-year could occur as soon as the early 2020s by some metrics. The recently discovered increase in CFC-11 emissions of ~ 13 Gg yr−1 may delay recovery. So far the impact on ozone is small, but if these emissions indicate production for foam use much more CFC-11 may be leaked in the future. Assuming such production over 10 years, disappearance of the ozone hole will be delayed by a few years, although there are significant uncertainties. Continued, substantial future CFC-11 emissions of 67 Gg yr−1 would delay Antarctic ozone recovery by well over a decade.

Item Type:
Journal Article
Journal or Publication Title:
Nature Communications
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
139787
Deposited By:
Deposited On:
23 Dec 2019 10:05
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Sep 2020 05:52