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@ARTICLE{Hoffmann:172968,
      author       = {Hoffmann, L. and Hoppe, Charlotte and Müller, Rolf and
                      Dutton, G. S. and Gille, J. C. and Griessbach, S. and Jones,
                      A. and Meyer, Catrin and Spang, R. and Volk, C. M. and
                      Walker, K. A.},
      title        = {{S}tratospheric lifetime ratio of {CFC}-11 and {CFC}-12
                      from satellite and model climatologies},
      journal      = {Atmospheric chemistry and physics},
      volume       = {14},
      number       = {22},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2014-06398},
      pages        = {12479 - 12497},
      year         = {2014},
      abstract     = {Chlorofluorocarbons (CFCs) play a key role in stratospheric
                      ozone loss and are strong infrared absorbers that contribute
                      to global warming. The stratospheric lifetimes of CFCs are a
                      measure of their stratospheric loss rates that are needed to
                      determine global warming and ozone depletion potentials. We
                      applied the tracer–tracer correlation approach to zonal
                      mean climatologies from satellite measurements and model
                      data to assess the lifetimes of CFCl3 (CFC-11) and CF2Cl2
                      (CFC-12). We present estimates of the CFC-11/CFC-12 lifetime
                      ratio and the absolute lifetime of CFC-12, based on a
                      reference lifetime of 52 years for CFC-11. We analyzed
                      climatologies from three satellite missions, the Atmospheric
                      Chemistry Experiment-Fourier Transform Spectrometer
                      (ACE-FTS), the HIgh Resolution Dynamics Limb Sounder
                      (HIRDLS), and the Michelson Interferometer for Passive
                      Atmospheric Sounding (MIPAS). We found a CFC-11/CFC-12
                      lifetime ratio of 0.47±0.08 and a CFC-12 lifetime of
                      112(96–133) years for ACE-FTS, a ratio of 0.46±0.07 and a
                      lifetime of 113(97–134) years for HIRDLS, and a ratio of
                      0.46±0.08 and a lifetime of 114(98–136) years for MIPAS.
                      The error-weighted, combined CFC-11/CFC-12 lifetime ratio is
                      0.46±0.04 and the CFC-12 lifetime estimate is
                      113(103–124) years. These results agree with the recent
                      Stratosphere-troposphere Processes And their Role in Climate
                      (SPARC) reassessment, which recommends lifetimes of
                      52(43–67) years and 102(88–122) years, respectively.
                      Having smaller uncertainties than the results from other
                      recent studies, our estimates can help to better constrain
                      CFC-11 and CFC-12 lifetime recommendations in future
                      scientific studies and assessments. Furthermore, the
                      satellite observations were used to validate first
                      simulation results from a new coupled model system, which
                      integrates a Lagrangian chemistry transport model into a
                      climate model. For the coupled model we found a
                      CFC-11/CFC-12 lifetime ratio of 0.48±0.07 and a CFC-12
                      lifetime of 110(95–129) years, based on a 10-year
                      perpetual run. Closely reproducing the satellite
                      observations, the new model system will likely become a
                      useful tool to assess the impact of advective transport,
                      mixing, and photochemistry as well as climatological
                      variability on the stratospheric lifetimes of long-lived
                      tracers.},
      cin          = {JSC / IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)JSC-20090406 / I:(DE-Juel1)IEK-7-20101013},
      pnm          = {411 - Computational Science and Mathematical Methods
                      (POF2-411)},
      pid          = {G:(DE-HGF)POF2-411},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000348536700007},
      doi          = {10.5194/acp-14-12479-2014},
      url          = {https://juser.fz-juelich.de/record/172968},
}