A decrease in radiative forcing and equivalent effective chlorine from hydrochlorofluorocarbons

Luke M. Western (), John S. Daniel, Martin K. Vollmer, Scott Clingan, Molly Crotwell, Paul J. Fraser, Anita L. Ganesan, Brad Hall, Christina M. Harth, Paul B. Krummel, Jens Mühle, Simon O’Doherty, Peter K. Salameh, Kieran M. Stanley, Stefan Reimann, Isaac Vimont, Dickon Young, Matt Rigby, Ray F. Weiss, Ronald G. Prinn and Stephen A. Montzka
Additional contact information
Luke M. Western: University of Bristol
John S. Daniel: NOAA Chemical Sciences Laboratory
Martin K. Vollmer: Laboratory for Air Pollution/Environmental Technology
Scott Clingan: NOAA Global Monitoring Laboratory
Molly Crotwell: NOAA Global Monitoring Laboratory
Paul J. Fraser: CSIRO Environment
Anita L. Ganesan: University of Bristol
Brad Hall: NOAA Global Monitoring Laboratory
Christina M. Harth: University of California San Diego
Paul B. Krummel: CSIRO Environment
Jens Mühle: University of California San Diego
Simon O’Doherty: University of Bristol
Peter K. Salameh: GC Soft Inc.
Kieran M. Stanley: University of Bristol
Stefan Reimann: Laboratory for Air Pollution/Environmental Technology
Isaac Vimont: NOAA Global Monitoring Laboratory
Dickon Young: University of Bristol
Matt Rigby: University of Bristol
Ray F. Weiss: University of California San Diego
Ronald G. Prinn: Massachusetts Institute of Technology
Stephen A. Montzka: NOAA Global Monitoring Laboratory

Nature Climate Change, 2024, vol. 14, issue 8, 805-807

Abstract: Abstract The Montreal Protocol and its successive amendments have been successful in curbing emissions of ozone-depleting substances and potent greenhouse gases via production/consumption controls. Here we show that the radiative forcing and equivalent effective chlorine from hydrochlorofluorocarbons has decreased from 61.75 mW m−2 and 321.69 ppt, respectively, since 2021, 5 years before the most recent projected decrease. This important milestone demonstrates the benefits of the Protocol for mitigating climate change and stratospheric ozone layer loss.

Date: 2024
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DOI: 10.1038/s41558-024-02038-7

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