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@ARTICLE{Vogel:13130,
      author       = {Vogel, B. and Feck, T. and Grooss, J.-U.},
      title        = {{I}mpact of stratospheric water vapor enhancements caused
                      by {CH}4 and {H}2{O} increase on polar ozone loss},
      journal      = {Journal of geophysical research / Atmospheres},
      volume       = {116},
      issn         = {0022-1406},
      address      = {Washington, DC},
      publisher    = {Union},
      reportid     = {PreJuSER-13130},
      pages        = {D 05301},
      year         = {2011},
      note         = {The authors thank Rolf Muller for very fruitful discussions
                      and three anonymous reviewers for comments that resulted in
                      significant improvements to the original manuscript. The
                      study was funded by the European Commission as part of the
                      project "A European Network for Atmospheric Hydrogen
                      observations and studies (EUROHYDROS)" under contract
                      036916. Simulations were performed on the Julich
                      Multiprocessor (JUMP) and were supported by the John von
                      Neumann Institute for Computing (NIC).},
      abstract     = {Possible causes of a future increase in stratospheric H2O
                      are increasing tropospheric methane levels and a rise in
                      tropospheric H-2 due to leakages from a possible increased
                      integration of hydrogen into the energy supply system. Here
                      we quantify the direct chemical impact of potential future
                      stratospheric H2O increases on Arctic ozone loss using the
                      cold Arctic winter 2004/2005 as the basis for our study. We
                      present simulations with the three-dimensional chemistry
                      transport model CLaMS using enhanced stratospheric H2O
                      values. Previous studies emphasized that increasing H2O
                      concentrations cause stratospheric cooling, and some have
                      suggested that this could significantly increase
                      halogen-induced polar ozone loss. The impact of both
                      increased stratospheric H2O values and decreased
                      temperatures on simulated ozone depletion is investigated.
                      Assuming an average increase of water vapor in the lower
                      polar stratosphere of approximate to 0.58 ppmv (averaged
                      over equivalent latitudes >= 65 degrees N, from 400-550 K
                      potential temperature and from December to March) and in
                      addition decreased temperatures (-0.2 K) yields at most 6.8
                      DU (approximate to 11 $\%)$ more accumulated ozone loss in
                      mid-March for the Arctic polar winter 2004/2005 compared to
                      the ozone loss for undisturbed conditions. The assumed H2O
                      enhancement in future decades is in the range of current
                      model predictions. Considering in addition the decrease of
                      the future chlorine loading (-40 $\%)$ of enhanced H2O
                      values (see above) yields at most 3.4 DU (10 $\%)$ of
                      accumulated ozone loss in springtime compared to current H2O
                      values. The impact of a potential future hydrogen economy
                      alone (assuming an averaged increase of 0.18 ppmv H2O in the
                      lower stratosphere) on springtime accumulated ozone loss is
                      found to be negligible (at most 2.5 DU (4 $\%))$ in this
                      study.},
      keywords     = {J (WoSType)},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK491},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000288087500002},
      doi          = {10.1029/2010JD014234},
      url          = {https://juser.fz-juelich.de/record/13130},
}