Historical trend of ozone-depleting substances and hydrofluorocarbon concentrations during 2004–2020 derived from satellite observations and estimates for global emissions

Ao Chen, Di Chen, Xiaoyi Hu, Christina M. Harth, Dickon Young, Jens Mühle, Paul B. Krummel, Simon O'Doherty, Ray F. Weiss, Ronald G. Prinn, Xuekun Fang*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

5 Citations (Scopus)

Abstract

Global concentrations (or mole fractions) and emissions of ozone-depleting substances (ODSs) and their hydrofluorocarbon (HFCs) substitutes that are controlled by the Montreal Protocol and its Amendments and adjustments (MP) are of great interest to both the scientific community and public. Previous studies on global concentrations and emissions have mostly relied on ground-based observations. Here, we assess the global concentrations and emissions of eight MP controlled substances and methyl chloride from ACE-FTS (Atmospheric Chemistry Experiment high−resolution infrared Fourier transform spectrometer) satellite observations: CFC-11 (CFCl3), CFC-12 (CF2Cl2), CCl4, HCFC-22 (CHClF2), HCFC-141b (C2H3Cl2F), HCFC-142b (C2H3ClF2), HFC-23 (CHF3), HFC-134a (C2H2F4), and CH3Cl. Results show that the ACE-FTS satellite observations can be used to derive the concentrations and emissions of these ODSs, HFCs, and CH3Cl, as they are consistent with those derived from the ground-based observations. Our findings imply that the changes in the concentrations and emissions of the ODSs and HFCs closely match the regulatory status of the MP, and satellite observations can be used to monitor the past and future progress of the MP.

Original languageEnglish
Article number120570
JournalEnvironmental Pollution
Volume316
DOIs
Publication statusPublished - 1 Jan 2023

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Concentration
  • Emission
  • Montreal protocol
  • Ozone-depleting substance
  • Satellite ACE-FTS

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