% 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{Ehhalt:57411,
      author       = {Ehhalt, D. H. and Rohrer, F. and Blake, D. R. and Kinnison,
                      D. E. and Konopka, P.},
      title        = {{O}n the {U}se of nonmethane hydrocarbons for the
                      {D}etermination of {A}ge {S}pectra in the {L}ower
                      {S}tratosphere},
      journal      = {Journal of Geophysical Research},
      volume       = {112},
      issn         = {0148-0227},
      address      = {Washington, DC},
      publisher    = {Union},
      reportid     = {PreJuSER-57411},
      pages        = {D11208},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {On 9 April 2001, while approaching the West Coast of the
                      North American continent, flight 20 of the NASA TRACE P
                      campaign penetrated deeply into a stratospheric intrusion.
                      From measurements aboard that flight we derive vertical
                      profiles of nonmethane hydrocarbons (NMHCs) and other
                      short-lived trace gases in the lower stratosphere using
                      Dichlorofluoromethane, CF2Cl2, as the altitude scale. All
                      profiles show an exponential decrease, which permits the
                      description of their vertical distribution by a single
                      parameter, the scale height. These scale heights are shown
                      to be related to the respective lifetimes in a unique
                      fashion. Using the approximation of a 1-D diffusive model
                      with a constant eddy diffusion coefficient, K, and assuming
                      constant lifetimes, we establish an analytical solution for
                      this relation. By fitting this theoretical expression to the
                      experimental data we can estimate K and thus obtain an
                      approximate age spectrum of the form given by Hall and Plumb
                      (1994). A much better fit to the experimental scale heights
                      is obtained, when we allow the lifetimes to be
                      height-dependent and calculate the theoretical scale heights
                      numerically from a 1-D model. An optimization also suggests
                      a constant K, but with a value of 0.46 m(2)/s, larger than
                      those obtained from the fit of the analytical solution. The
                      obtained age spectra should be valid for transit times not
                      longer than 300 days.},
      keywords     = {J (WoSType)},
      cin          = {ICG-1 / ICG-2},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB790 / I:(DE-Juel1)VDB791},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000247534200002},
      doi          = {10.1029/2006JD007686},
      url          = {https://juser.fz-juelich.de/record/57411},
}