% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Mller:57828,
      author       = {Müller, R. and Tilmes, S. and Grooß, J.-U. and Engel, A.
                      and Oelhaf, H. and Wetzel, G. and Huret, N. and Pirre, M.
                      and Catoire, V. and Toon, G. and Nakajima, H.},
      title        = {{I}mpact of mesospheric intrusions on ozone-tracer
                      relations in the stratospheric polar vortex},
      journal      = {Journal of Geophysical Research},
      volume       = {112},
      issn         = {0148-0227},
      address      = {Washington, DC},
      publisher    = {Union},
      reportid     = {PreJuSER-57828},
      pages        = {D23307},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {[1] Ozone-tracer relations are used to quantify chemical
                      ozone loss in the polar vortices. The underlying assumptions
                      for the application of this technique were extensively
                      discussed in recent years. However, the impact intrusions of
                      mesospheric air into the polar stratosphere have on
                      estimates of chemical ozone loss based on the ozone-tracer
                      technique has not hitherto been studied. Here, we revisit
                      observations of an intrusion of mesospheric air down to
                      altitudes of similar to 25 km (similar to 600 K potential
                      temperature) in the Arctic vortex in 2003. The mesospheric
                      intrusion was identified in three balloon profiles in
                      January and March 2003 as a strong enhancement in CO. In
                      contrast, NOy was not enhanced in the mesospheric air
                      relative to surrounding air masses as shown by the
                      measurement in late March 2003. The measurements influenced
                      by mesospheric air show ozone mixing ratios ranging between
                      3.6 and 5.6 ppm, which are clearly greater than those found
                      in the "early vortex" reference relation employed to deduce
                      chemical ozone loss. Thus the impact of intrusions of
                      mesospheric air into the polar vortex on chemical ozone loss
                      estimates based on ozone-tracer relations are likely small;
                      the correlations cannot be affected in a way that would lead
                      to an overestimate of ozone depletion. Therefore
                      ozone-tracer relations may be used for deducing chemical
                      ozone loss in Arctic winter 2002-2003. Here we use ILAS-II
                      satellite measurements to deduce an average chemical ozone
                      loss in the vortex core for the partial column 380-550 K of
                      37 +/- 11 Dobson units in March and of 50 +/- 10 Dobson
                      units in April 2003.},
      keywords     = {J (WoSType)},
      cin          = {ICG-1},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB790},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000251691000003},
      doi          = {10.1029/2006JD008315},
      url          = {https://juser.fz-juelich.de/record/57828},
}