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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Volume 18, issue 18
Atmos. Chem. Phys., 18, 13305-13320, 2018
https://doi.org/10.5194/acp-18-13305-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 18, 13305-13320, 2018
https://doi.org/10.5194/acp-18-13305-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 17 Sep 2018

Research article | 17 Sep 2018

Inverse modelling of CF4 and NF3 emissions in East Asia

Tim Arnold1,2,3, Alistair J. Manning3, Jooil Kim4, Shanlan Li5, Helen Webster3, David Thomson3, Jens Mühle4, Ray F. Weiss4, Sunyoung Park5,6, and Simon O'Doherty7 Tim Arnold et al.
  • 1National Physical Laboratory, Teddington, Middlesex, UK
  • 2School of GeoSciences, University of Edinburgh, Edinburgh, UK
  • 3Met Office, Exeter, UK
  • 4Scripps Institution of Oceanography, University of California, San Diego, CA, USA
  • 5Kyungpook Institute of Oceanography, Kyungpook National University, Daegu, South Korea
  • 6Department of Oceanography, Kyungpook National University, Daegu, South Korea
  • 7School of Chemistry, University of Bristol, Bristol, UK

Abstract. Decadal trends in the atmospheric abundances of carbon tetrafluoride (CF4) and nitrogen trifluoride (NF3) have been well characterised and have provided a time series of global total emissions. Information on locations of emissions contributing to the global total, however, is currently poor. We use a unique set of measurements between 2008 and 2015 from the Gosan station, Jeju Island, South Korea (part of the Advanced Global Atmospheric Gases Experiment network), together with an atmospheric transport model, to make spatially disaggregated emission estimates of these gases in East Asia. Due to the poor availability of good prior information for this study, our emission estimates are largely influenced by the atmospheric measurements. Notably, we are able to highlight emission hotspots of NF3 and CF4 in South Korea due to the measurement location. We calculate emissions of CF4 to be quite constant between the years 2008 and 2015 for both China and South Korea, with 2015 emissions calculated at 4.3±2.7 and 0.36±0.11Ggyr−1, respectively. Emission estimates of NF3 from South Korea could be made with relatively small uncertainty at 0.6±0.07Ggyr−1 in 2015, which equates to  ∼ 1.6% of the country's CO2 emissions. We also apply our method to calculate emissions of CHF3 (HFC-23) between 2008 and 2012, for which our results find good agreement with other studies and which helps support our choice in methodology for CF4 and NF3.

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Emissions of carbon tetrafluoride CF4, NF3 and CHF3 in east Asia have been calculated using atmospheric measurements and an atmospheric transport model. We calculate emissions of CF4 to be quite constant between the years 2008 and 2015 for both China and South Korea, with 2015 emissions calculated at 4.33 ± 2.65 Gg yr-1 and 0.36 ± 0.11 Gg yr-1, respectively. Emission estimates of NF3 from South Korea could be made with relatively small uncertainty at 0.6 ± 0.07 Gg yr-1 in 2015.
Emissions of carbon tetrafluoride CF4, NF3 and CHF3 in east Asia have been calculated using...
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