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@ARTICLE{Adcock:885892,
      author       = {Adcock, Karina E. and Ashfold, Matthew J. and Chou, Charles
                      C.-K. and Gooch, Lauren J. and Mohd Hanif, Norfazrin and
                      Laube, Johannes C. and Oram, David E. and Ou-Yang,
                      Chang-Feng and Panagi, Marios and Sturges, William T. and
                      Reeves, Claire E.},
      title        = {{I}nvestigation of {E}ast {A}sian {E}missions of {CFC}-11
                      {U}sing {A}tmospheric {O}bservations in {T}aiwan},
      journal      = {Environmental science $\&$ technology},
      volume       = {54},
      number       = {7},
      issn         = {1520-5851},
      address      = {Columbus, Ohio},
      publisher    = {American Chemical Society},
      reportid     = {FZJ-2020-04164},
      pages        = {3814 - 3822},
      year         = {2020},
      abstract     = {Recent findings of an unexpected slowdown in the decline of
                      CFC-11 mixing ratios in the atmosphere have led to the
                      conclusion that global CFC-11 emissions have increased over
                      the past decade and have been attributed in part to eastern
                      China. This study independently assesses these findings by
                      evaluating enhancements of CFC-11 mixing ratios in air
                      samples collected in Taiwan between 2014 and 2018. Using the
                      NAME (Numerical Atmospheric Modeling Environment) particle
                      dispersion model, we find the likely source of the enhanced
                      CFC-11 observed in Taiwan to be East China. Other
                      halogenated trace gases were also measured, and there were
                      positive interspecies correlations between CFC-11 and CHCl3,
                      CCl4, HCFC-141b, HCFC-142b, CH2Cl2, and HCFC-22, indicating
                      co-location of the emissions of these compounds. These
                      correlations in combination with published emission
                      estimates of CH2Cl2 and HCFC-22 from China, and of CHCl3 and
                      CCl4 from eastern China, are used to estimate CFC-11
                      emissions. Within the uncertainties, these estimates do not
                      differ for eastern China and the whole of China, so we
                      combine them to derive a mean estimate that we term as being
                      from “(eastern) China”. For 2014–2018, we estimate an
                      emission of 19 ± 5 Gg year–1 (gigagrams per year) of
                      CFC-11 from (eastern) China, approximately one-quarter of
                      global emissions. Comparing this to previously reported
                      CFC-11 emissions estimated for earlier years, we estimate
                      CFC-11 emissions from (eastern) China to have increased by 7
                      ± 5 Gg year–1 from the 2008–2011 average to the
                      2014–2018 average, which is 50 ± $40\%$ of the estimated
                      increase in global CFC-11 emissions and is consistent with
                      the emission increases attributed to this region in an
                      earlier study.},
      cin          = {IEK-7},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {244 - Composition and dynamics of the upper troposphere and
                      middle atmosphere (POF3-244)},
      pid          = {G:(DE-HGF)POF3-244},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {32126759},
      UT           = {WOS:000526418000012},
      doi          = {10.1021/acs.est.9b06433},
      url          = {https://juser.fz-juelich.de/record/885892},
}