We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A rise in HFC-23 emissions from eastern Asia since 2015.
- Authors
Park, Hyeri; Kim, Jooil; Choi, Haklim; Geum, Sohyeon; Kim, Yeaseul; Thompson, Rona L.; Mühle, Jens; Salameh, Peter K.; Harth, Christina M.; Stanley, Kieran M.; O'Doherty, Simon; Fraser, Paul J.; Simmonds, Peter G.; Krummel, Paul B.; Weiss, Ray F.; Prinn, Ronald G.; Park, Sunyoung
- Abstract
Trifluoromethane (CHF 3 , HFC-23), one of the most potent greenhouse gases among hydrofluorocarbons (HFCs), is mainly emitted to the atmosphere as a by-product in the production of the ozone-depleting legacy refrigerant and chemical feedstock chlorodifluoromethane (CHClF 2 , HCFC-22). A recent study on atmospheric observation-based global HFC-23 emissions (top-down estimates) showed significant discrepancies over 2014–2017 between the increase in the observation-derived emissions and the 87 % emission reduction expected from capture and destruction processes of HFC-23 at HCFC-22 production facilities implemented by national phase-out plans (bottom-up emission estimates) (Stanley et al., 2020). However, the actual regions responsible for the increased emissions were not identified. Here, we estimate the regional top-down emissions of HFC-23 for eastern Asia based on in situ measurements at Gosan, South Korea, and show that the HFC-23 emissions from eastern China have increased from 5.0±0.4 Gg yr -1 in 2008 to 9.5±1.0 Gg yr -1 in 2019. The continuous rise since 2015 was contrary to the large emissions reduction reported under the Chinese hydrochlorofluorocarbons production phase-out management plan (HPPMP). The cumulative difference between top-down and bottom-up estimates for 2015–2019 in eastern China was ∼23.7±3.6 Gg, which accounts for 47±11 % of the global mismatch. Our analysis based on HCFC-22 production information suggests the HFC-23 emissions rise in eastern China is more likely associated with known HCFC-22 production facilities rather than the existence of unreported, unknown HCFC-22 production, and thus observed discrepancies between top-down and bottom-up emissions could be attributed to unsuccessful factory-level HFC-23 abatement and inaccurate quantification of emission reductions.
- Subjects
CHINA; GREENHOUSE gas mitigation; GREENHOUSE gases; HYDROCHLOROFLUOROCARBONS; REFRIGERANTS; FLUOROFORM
- Publication
Atmospheric Chemistry & Physics, 2023, Vol 23, Issue 16, p9401
- ISSN
1680-7316
- Publication type
Article
- DOI
10.5194/acp-23-9401-2023