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@ARTICLE{Gnther:23756,
      author       = {Günther, G. and McKenna, D. S. and Spang, R.},
      title        = {{T}he meteorological conditions of the stratosphere for the
                      {CRISTA}2 campaign ({A}ugust 1997)},
      journal      = {Journal of Geophysical Research},
      volume       = {107},
      issn         = {0148-0227},
      address      = {Washington, DC},
      publisher    = {Union},
      reportid     = {PreJuSER-23756},
      year         = {2002},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {[1] During the CRISTA 2 campaign in August 1997 the
                      Antarctic polar vortex according to UK Met Office (UKMO)
                      data was strong but temporarily disturbed by planetary
                      waves. This winter was in general warmer than the five
                      previous winters; nevertheless, temperatures cold enough to
                      allow the formation of nitric acid trihydrate (NAT) and ice
                      particles occurred throughout the period from mid-June to
                      the end of August. The cold vortex core developed in the
                      potential temperature range from 400 to 700 K at the
                      beginning of the winter, initially centered at 600 K but
                      slowly progressing downward to 450 K in the subsequent
                      months. The vortex disturbances showed a clear zonal wave
                      number 1 and 2 pattern. This planetary wave activity caused
                      a strong day-to-day fluctuation of the vortex shape. During
                      August when the second Cryogenic Infrared Spectrometers and
                      Telescopes for the Atmosphere (CRISTA 2) mission took place
                      the vortex was elongated toward the southern Atlantic Ocean,
                      processing slowly eastward. The perturbation of the vortex
                      was associated with air masses transported from middle and
                      low latitudes into the polar region in small-scale
                      streamers. Similarly, tongues of vortex air peeled off the
                      vortex edge and moved equatorward, enhancing the exchange
                      between polar regions and the tropics. In addition, the
                      disturbance of the vortex led to the generation of filaments
                      at the inner side of the vortex edge, thus covering the
                      vortex interior with small-scale structures. A comparison
                      between CRISTA observations and potential vorticity derived
                      from UKMO data shows discrepancies concerning small-scale
                      structures. High-resolution potential vorticity fields
                      calculated from reverse domain filling trajectory
                      simulations on isentropic surfaces based on horizontal winds
                      from UKMO analyses and vertical motion from diabatic
                      calculations are much more consistent with the measurements.
                      Both observation and reverse domain filling (RDF)
                      simulations show the strong atmospheric variability of this
                      period of unusual enhanced planetary wave activity in the
                      Southern Hemisphere.},
      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:000180490000012},
      doi          = {10.1029/2001JD000692},
      url          = {https://juser.fz-juelich.de/record/23756},
}