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@ARTICLE{Tilmes:23766,
      author       = {Tilmes, S. and Müller, R. and Grooß, J. U. and McKenna,
                      D. S. and Russell III, J. M. and Sasano, Y.},
      title        = {{C}alculation of chemical ozone loss in the {A}rctic winter
                      1996-1997 using ozone-tracer correlations : comparison of
                      {ILAS} and {HALOE} results},
      journal      = {Journal of Geophysical Research},
      volume       = {108},
      issn         = {0148-0227},
      address      = {Washington, DC},
      publisher    = {Union},
      reportid     = {PreJuSER-23766},
      pages        = {4045},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {[1] The ozone-tracer correlation method is used to deduce
                      the stratospheric ozone loss in the Arctic winter 1996-1997.
                      Improvements of the technique are applied, such as a new
                      calculation of the vortex edge [Nash et al., 1996] and an
                      improved early vortex reference function. Winter 1996-1997
                      is characterized by a late formation and an unusually long
                      lifetime of the polar vortex. Remnants of vortex air were
                      found until May. Chemical ozone losses deduced from two
                      satellite data sets, namely Improved Limb Atmospheric
                      Spectrometer (ILAS) and Halogen Occultation Experiment
                      (HALOE), are discussed. The ILAS observations allow a
                      detailed analysis of the temporal evolution of the
                      ozone-tracer correlation inside the polar vortex and, in
                      particular, of the development of the early vortex. For
                      November and December 1996, it is shown that horizontal
                      mixing still influences the ozone-tracer relation.
                      Significant PSC related chemical ozone loss occurred
                      beginning at mid-February, and the averaged column ozone
                      loss is increasing toward the middle of May. From April
                      onwards, ozone profiles in the vortex became more uniform.
                      The decrease of ozone in the vortex remnants in April and
                      May occurred due to chemistry. HALOE observations are
                      available for March to May 1997. In the period 4-16 March
                      1997, the calculated ozone loss deduced from HALOE and ILAS
                      is in good agreement. The average of the result from the two
                      instruments is 15 +/- 7 Dobson units (DU) inside the vortex
                      core, in the altitude range of 450-550 K. At the end of
                      March, a discrepancy between HALOE and ILAS ozone loss
                      arises due to a significant difference (0.6 ppmv) between
                      the two data sets in the relatively low ozone minimum
                      measured at 475 K. Nonetheless, both data sets consistently
                      show an inhomogeneity in ozone loss inside the vortex core
                      at the end of March. The vortex is separated in two parts,
                      one with a large ozone loss (HALOE 40-45 DU, ILAS 30-35 DU)
                      and one with a moderate ozone loss (HALOE 15-30 DU, ILAS
                      5-25 DU) for 450-550 K. The ozone loss from HALOE in 380-550
                      K at that time was calculated to be 90-110 DU for the large
                      ozone loss and 20-80 DU for the moderate ozone loss. The
                      vortex average of column ozone loss from HALOE inside the
                      vortex core at the end of March is 61 +/- 20 DU, which is an
                      increase of about $20\%$ compared to the earlier study by
                      Muller et al. [1997b] brought about by the improvement of
                      the technique.},
      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:000181823400003},
      doi          = {10.1029/2002JD002213},
      url          = {https://juser.fz-juelich.de/record/23766},
}