University of Bristol research signals major milestone in cutting harmful gases that deplete ozone

The results are based on high-precision measurements at globally distributed atmospheric observatories. The research used data from the National Atmospheric and Oceanic Administration and Advanced Global Atmospheric Gases Experiment.

University of Bristol research has shown that for the first time, a notable decline was seen in the atmospheric levels of potent ozone-depleting substances (ODS), called hydrochlorofluorocarbons (HCFCs). This reduction is expected to also reduce global warming.

Lead author Dr Luke Western, Marie Curie Research Fellow at the University’s School of Chemistry, said, “The results are very encouraging. They underscore the great importance of establishing and sticking to international protocols. Without the Montreal Protocol, this success would not have been possible, so it’s a resounding endorsement of multilateral commitments to combat stratospheric ozone depletion, with additional benefits in tackling human-induced climate change.”

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As per the international study the total amount of ozone depleting chlorine contained in all HCFCs peaked in 2021. The drop between 2021 and 2023 was less than 1%, but it still shows HCFC emissions are heading in the right direction.

“Their production is currently being phased out globally, with a completion date slated for 2040. In turn, these HCFCs are being replaced by non-ozone-depleting hydrofluorocarbons (HFCs) and other compounds. By enforcing strict controls and promoting the adoption of ozone-friendly alternatives, the protocol has successfully curbed the release and levels of HCFCs into the atmosphere," said Dr Western.

Co-author Dr Martin Vollmer, an atmospheric scientist at the Swiss Federal Laboratories for Materials Science and Technology (EMPA) said, "We use highly sensitive measurement techniques and thorough protocols to ensure the reliability of these observations."

“This study highlights the critical need to be vigilant and proactive in our environmental monitoring, ensuring other controlled ozone-depleting and greenhouse gases follow a similar trend which will help to protect the planet for future generations," said co-author Dr Isaac Vimont, a research scientist at the NOAA in the United States.

Prospective students to visit Bristol for first open days

More than 40,000 prospective students and their loved ones will be visiting the University of Bristol's first open days of the year. They will visit the university on June 14 and June 15 to learn about the university's scholarships, careers services and the 350 clubs and societies on offer through the Bristol Students’ Union.

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