CCl4 emissions in eastern China during 2021–2022 and exploration of potential new sources

Bowei Li, Jiahuan Huang, Xiaoyi Hu, Lulu Zhang, Mengyue Ma, Liting Hu, Di Chen, Qianna Du, Yahui Sun, Zhouxiang Cai, Ao Chen, Xinhe Li, Rui Feng, Ronald G. Prinn and Xuekun Fang ()
Additional contact information
Bowei Li: Zhejiang University
Jiahuan Huang: Wuxi Ecology Environment Monitoring and Control Center
Xiaoyi Hu: Zhejiang University
Lulu Zhang: Wuxi Ecology Environment Monitoring and Control Center
Mengyue Ma: Zhejiang University
Liting Hu: Zhejiang University
Di Chen: Zhejiang University
Qianna Du: Zhejiang University
Yahui Sun: Zhejiang University
Zhouxiang Cai: Zhejiang University
Ao Chen: Johns Hopkins University
Xinhe Li: Zhejiang University
Rui Feng: Zhejiang University
Ronald G. Prinn: Center for Global Change Science, Massachusetts Institute of Technology
Xuekun Fang: Zhejiang University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract According to the Montreal Protocol, the production and consumption of ozone-layer-depleting CCl4 for dispersive applications was globally phased out by 2010, including China. However, continued CCl4 emissions were disclosed, with the latest CCl4 emissions unknown in eastern China. In the current study, based on the atmospheric measurements of ~12,000 air samples taken at two sites in eastern China, the 2021–2022 CCl4 emissions are quantified as 7.6 ± 1.7 gigagrams per year. This finding indicates that CCl4 emissions continued after being phased out for dispersive uses in 2010. Subsequently, our study identifies potential industrial sources (manufacture of general purpose machinery and manufacture of raw chemical materials, and chemical products) of CCl4 emissions.

Date: 2024
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DOI: 10.1038/s41467-024-45981-x

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