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@ARTICLE{ZhangLiu:1032461,
      author       = {Zhang-Liu, Yiran and Müller, Rolf and Grooß, Jens-Uwe and
                      Robrecht, Sabine and Vogel, Bärbel and Zafar, Abdul Mannan
                      and Lehmann, Ralph},
      title        = {{T}he impact of dehydration and extremely low {HC}l values
                      in the {A}ntarctic stratospheric vortex in mid-winter on
                      ozone loss in spring},
      journal      = {Atmospheric chemistry and physics},
      volume       = {24},
      number       = {22},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2024-06261},
      pages        = {12557 - 12574},
      year         = {2024},
      abstract     = {Simulations of Antarctic chlorine and ozone chemistry in
                      previous work show that in the core of theAntarctic vortex
                      (16–18 km, 85–55 hPa, 390–430 K) HCl null cycles
                      (initiated by reactions of Cl with CH4 andCH2O) are
                      effective. These HCl null cycles cause both HCl molar mixing
                      ratios to remain very low throughoutAntarctic winter and
                      spring. They cause ozone-destroying chlorine (ClOx ) to
                      remain enhanced so that rapidozone depletion proceeds. Here
                      we investigate the impact of the observed dehydration in
                      Antarctica, whichstrongly reduces ice formation and the
                      uptake of HNO3 from the gas phase; however the efficacy of
                      HCl nullcycles is not affected. Moreover, also when using
                      the observed very low HCl molar mixing ratios in
                      Antarcticwinter as an initial value, HCl null cycles are
                      efficient in maintaining low HCl (and high ClOx )
                      throughout winterand spring. Further, the reaction CH3O2 +
                      ClO is important for the efficacy of the HCl null cycle
                      initiated by thereaction CH4 +Cl. Using the current kinetic
                      recommendations instead of earlier ones has very little
                      impact on thesimulations. All simulations presented here for
                      the core of the Antarctic vortex show extremely low
                      minimumozone values (below 50 ppb) in late September to
                      early October in agreement with observations.},
      cin          = {ICE-4},
      ddc          = {550},
      cid          = {I:(DE-Juel1)ICE-4-20101013},
      pnm          = {2112 - Climate Feedbacks (POF4-211)},
      pid          = {G:(DE-HGF)POF4-2112},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001353688300001},
      doi          = {10.5194/acp-24-12557-2024},
      url          = {https://juser.fz-juelich.de/record/1032461},
}