Stephen Montzka: Are emissions of the banned ozone-depleting substance CFC-11 still increasing?

On science informing international policy: Are emissions of the banned ozone-depleting substance CFC-11 still increasing, and what’s being done about it?

Speaker: Stephen Montzka, NOAA - Boulder

Abstract:

In this presentation, I will review the scientific evidence pointing to an emission increase in CFC-11 that has occurred in recent years, and describe how this evidence implies renewed production in contravention of the Montreal Protocol. I will also update our global-scale measurements to provide an understanding how the CFC-11 emissions have changed since publication of these papers and China’s initial mitigation efforts.

Finally, I will take the opportunity to describe how the international communities of policymakers, scientists, and industry experts have responded to this surprising finding, and how they are working to improve our understanding of the issue to ensure its rapid resolution and a minimal delay in the recovery of stratospheric ozone.

Date: August 26, 2019