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@ARTICLE{Mller:31451,
      author       = {Müller, R. and Günther, G.},
      title        = {{A} {G}eneralized {F}orm of {L}ait's {M}odified {P}otential
                      {V}orticity},
      journal      = {Journal of the atmospheric sciences},
      volume       = {60},
      issn         = {0022-4928},
      address      = {Boston, Mass.},
      publisher    = {American Meteorological Soc.},
      reportid     = {PreJuSER-31451},
      pages        = {2229 - 2237},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Ertel's potential vorticity P is in widespread use as a
                      diagnostic of dynamical processes in the stratosphere. For a
                      variety of applications, however, the exponential increase
                      of P with altitude is problematic. For this reason, Lait
                      proposed a modified potential vorticity Pi(L) where a
                      physically meaningful scaling is introduced that removes
                      much of the altitude dependence of P. Here a generalized
                      form of Pi(L) is proposed by introducing an additional
                      degree of freedom in the scaling. This generalized modified
                      potential vorticity Pi(g) possesses the same conservation
                      properties as Pi(L) itself and as the classic potential
                      vorticity P but can be adjusted more closely to the specific
                      situation under investigation. Comparison, over a large
                      altitude range in the stratosphere, of fields of Pi(g) with
                      dynamical measures of the polar vortex edge and with
                      observations of the long-lived trace gas N2O shows that
                      Pi(g) constitutes a more intuitively interpretable quantity
                      than Pi(L).},
      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:000184841500013},
      doi          = {10.1175/1520-0469(2003)060<2229:AGFOLM>2.0.CO;2},
      url          = {https://juser.fz-juelich.de/record/31451},
}