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@ARTICLE{Konopka:32564,
      author       = {Konopka, Paul and Grooß, J.-U. and Bausch, S. and Müller,
                      R. and McKenna, D. S. and Morgenstern, O. and Orsoloni, Y.},
      title        = {{D}ynamics and chemistry of vortex remnants in late
                      {A}rctic spring 1997 and 2000:{S}imulations with the
                      {C}hemical {L}agrangian {M}odel of the {S}tratosphere
                      ({CL}a{MS})},
      journal      = {Atmospheric chemistry and physics},
      volume       = {3},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-32564},
      pages        = {839 - 849},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {High-resolution simulations of the chemical composition of
                      the Arctic stratosphere during late spring 1997 and 2000
                      were performed with the Chemical Lagrangian Model of the
                      Stratosphere (CLaMS). The simulations were performed for the
                      entire northern hemisphere on two isentropic levels 450K
                      (approximate to18 km) and 585 K (approximate to24 km).The
                      spatial distribution and the lifetime of the vortex remnants
                      formed after the vortex breakup in May 1997 display
                      different behavior above and below 20 km. Above 20 km,
                      vortex remnants propagate southward (up to 40degreesN) and
                      are "frozen in" in the summer circulation without
                      significant mixing. Below 20 km the southward propagation of
                      the remnants is bounded by the subtropical jet. Their
                      lifetime is shorter by a factor of 2 than that above 20 km,
                      owing to significant stirring below this altitude. The
                      behavior of vortex remnants formed in March 2000 is similar
                      but, due to an earlier vortex breakup, dominated during the
                      first 6 weeks after the vortex breakup by westerly winds,
                      even above 20 km.Vortex remnants formed in May 1997 are
                      characterized by large mixing ratios of HCl indicating
                      negligible, halogen-induced ozone loss. In contrast,
                      mid-latitude ozone loss in late boreal spring 2000 is
                      dominated, until mid-April, by halogen-induced ozone
                      destruction within the vortex remnants, and subsequent
                      transport of the ozone-depleted polar air masses (dilution)
                      into the mid-latitudes. By varying the intensity of mixing
                      in CLaMS, the impact of mixing on the formation of ClONO2
                      and ozone depletion is investigated. We find that the
                      photochemical decomposition of HNO3 and not mixing with
                      NOx-rich mid-latitude air is the main source of NOx within
                      the vortex remnants in March and April 2000. Ozone depletion
                      in the remnants is driven by ClOx photolytically formed from
                      ClONO2. At the end of May 1997, the halogen-induced ozone
                      deficit at 450 K poleward of 30degreesN amounts to
                      approximate $to12\%$ with approximate $to10\%$ in the polar
                      vortex and approximate $to2\%$ in well-isolated vortex
                      remnants after the vortex breakup.},
      keywords     = {J (WoSType)},
      cin          = {ICG-I},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB47},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000183876300002},
      url          = {https://juser.fz-juelich.de/record/32564},
}