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Concentrations and emissions of trichlorotrifluoroethane (CFC-113) from eastern china inferred from atmospheric observations

Authors :
Yang Yang
Xinhe Li
Bowei Li
Xiaoyi Hu
Xuekun Fang
Source :
Environmental Research Communications. 4:121003
Publication Year :
2022
Publisher :
IOP Publishing, 2022.

Abstract

Trichlorotrifluoroethane (C2Cl3F3, CFC-113) is a long-lived ozone-depleting substance (ODS) regulated under the Montreal Protocol and a potent greenhouse gas (GHG). Production and consumption of chlorofluorocarbons (CFCs) were phased out after 2007 in China, while unexpected increases in CCl3F (CFC-11) emissions from eastern China after 2012 were inferred from atmospheric observations. However, atmospheric concentrations and emissions of CFC-113 in China over the past few years are unclear. In this study, we conducted hourly observation of atmospheric CFC-113 concentrations in 2021 in eastern China, explored the potential CFC-113 emission sources using a dispersion model, and estimated the CFC-113 emissions using an interspecies correlation method. Results show that pollution events of CFC-113 were observed frequently, and the concentrations were higher than those of global background stations with similar latitudes. The dominant potential emission regions of CFC-113 were located in the eastern-central Yangtze River Delta region and Shandong province. The estimated mean CFC-113 emission from eastern China in 2021 was 0.88 ± 0.19 Gg/yr (5350 ± 1155 CO2-equivalent Gg/yr), which was higher than 0 Gg/yr (0 CO2-equivalent Gg/yr) in 2008−2021, as reported by bottom-up studies that considered CFC-113 to be phased out in China after 2007. Therefore, substantial CFC-113 emissions still existed in eastern China in 2021, which are of importance to protecting the ozone layer and mitigating the effects of climate change.

Details

ISSN :
25157620
Volume :
4
Database :
OpenAIRE
Journal :
Environmental Research Communications
Accession number :
edsair.doi...........49284c6c6f688eea6974f9b6827f38a2
Full Text :
https://doi.org/10.1088/2515-7620/aca3f0