期刊
ATMOSPHERIC CHEMISTRY AND PHYSICS
卷 22, 期 14, 页码 9601-9616出版社
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/acp-22-9601-2022
关键词
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资金
- H2020 Marie Sklodowska-Curie Actions [101030750]
- National Aeronautics and Space Administration [NNX16AC98G, NNX16AC96G, NNX16AC97G]
- Department for Business, Energy and Industrial Strategy, UK Government [1537/06/2018]
- Climate Program Office [NA21OAR4310233]
- Natural Environment Research Council [NE/N016548/1, R100529-101]
- National Research Foundation of Korea [2020R1A2C3003774]
- Marie Curie Actions (MSCA) [101030750] Funding Source: Marie Curie Actions (MSCA)
- National Research Foundation of Korea [2020R1A2C3003774] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Despite a decrease in reported production and consumption, global emissions of the ozone-depleting gas HCFC-141b have increased from 2017 to 2021. The study suggests that this rise may be attributed to emissions from the disposal of appliances containing HCFC-141b or unreported production for dispersive uses.
Global emissions of the ozone-depleting gas HCFC-141b (1,1-dichloro- 1-fluoroethane, CH3CCl2F) derived from measurements of atmospheric mole fractions increased between 2017 and 2021 despite a fall in reported production and consumption of HCFC-141b for dispersive uses. HCFC-141b is a controlled substance under the Montreal Protocol, and its phase-out is currently underway, after a peak in reported consumption and production in developing (Article 5) countries in 2013. If reported production and consumption are correct, our study suggests that the 2017-2021 rise is due to an increase in emissions from the bank when appliances containing HCFC-141b reach the end of their life, or from production of HCFC-141b not reported for dispersive uses. Regional emissions have been estimated between 2017-2020 for all regions where measurements have sufficient sensitivity to emissions. This includes the regions of northwestern Europe, east Asia, the United States and Australia, where emissions decreased by a total of 2.3 +/- 4.6 Gg yr(-1), compared to a mean global increase of 3.0 +/- 1.2 Gg yr(-1) over the same period. Collectively these regions only account for around 30 % of global emissions in 2020. We are not able to pinpoint the source regions or specific activities responsible for the recent global emission rise.
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