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SUMMARY:Challenges for the Montreal Protocol revealed in atmospheric measu
 rements - Prof Matthew Rigby\, University of Bristol
DTSTART:20260203T140000Z
DTEND:20260203T150000Z
UID:TALK241246@talks.cam.ac.uk
CONTACT:David Madden
DESCRIPTION:The Montreal Protocol remains a landmark achievement in intern
 ational environmental policy\, having successfully reduced the production 
 and use of many ozone-depleting substances (ODS). However\, recent atmosph
 eric observations have revealed trends that are inconsistent with the full
  implementation of the Protocol’s controls. This talk will explore how a
 tmospheric records were used to detect unreported emissions of CFC-11\, a 
 banned chlorofluorocarbon\, years after its global phase-out. I will also 
 examine the ongoing case of HFC-23\, a potent greenhouse gas and industria
 l by-product\, whose emissions have persisted despite reports of near-tota
 l elimination in advance of the Kigali Amendment to the Protocol. These ca
 se studies\, based on observations\, modelling and Bayesian inference\, il
 lustrate the critical role of independent atmospheric monitoring in verify
 ing compliance and identifying discrepancies. Additional emerging issues w
 ill be discussed\, emphasizing the need for expanded\, transparent\, and g
 lobally coordinated observation networks to ensure the continued success o
 f the Protocol and the protection of the stratospheric ozone layer and mit
 igation of climate change.\n\nProf. Matt Rigby is a Professor in the Atmos
 pheric Chemistry Research Group at the University of Bristol. His research
  focusses on the interpretation of atmospheric measurements of greenhouse 
 gases and ozone depleting substances. He is a member of the Advanced Globa
 l Atmospheric Gases Experiment (AGAGE) and leads the Investigating HALocar
 bon impacts on the Global Environment (InHALE) project. He has twice serve
 d as a lead author of the World Meteorological Organisation Scientific Ass
 essment of Ozone Depletion.
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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