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@ARTICLE{Bujok:647,
      author       = {Bujok, A. A. and Tan, V. and Klein, E. and Nopper, R. and
                      Bauer, R. and Engel, A. and Gerhards, M.-T. and Afchine, A.
                      and MacKenna, A. R. and Schmidt, U. and Wienhold, F. and
                      Fischer, H.},
      title        = {{GHOST} - a novel airborne gas chromatograph for in situ
                      measurements of long-lived tracers in the lower stratosphere
                      : method und {A}pplications},
      journal      = {Journal of atmospheric chemistry},
      volume       = {39},
      issn         = {0167-7764},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {PreJuSER-647},
      pages        = {37 - 64},
      year         = {2001},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {A novel fully-automated airborne gas chromatograph for in
                      situ measurements of long-lived stratospheric tracers has
                      been developed, combining the high selectivity of a megabore
                      PLOT capillary column with recently developed sampling and
                      separation techniques. The Gas cHromatograph for the
                      Observation of Stratospheric Tracers (GHOST) has been
                      successfully operated during three STREAM campaigns
                      (Stratosphere TRoposphere Experiment by Airborne
                      Measurement) onboard a Cessna Citation II aircraft in two
                      different modes: Either N2O and CF2Cl2 (CFC-12) or CFC-12
                      and CFCl3 (CFC-11) have been measured simultaneously, with a
                      time resolution of 2 min for both modes. Under flight
                      conditions the instrument precision (1 sigma) for these
                      species is better than $0.9\%,$ and the accuracy (1 sigma)
                      is better than $2.0\%$ of the tropospheric values of all
                      measured compounds. The detection limits (3 sigma) are below
                      28 ppb for N2O, 14 ppt for CFC-12, and 8 ppt for CFC-11,
                      respectively, i.e., well below $10\%$ of the tropospheric
                      values of all measured compounds. Post-mission optimization
                      of the chromatographic separation showed a possible
                      enhancement of the time resolution by up to a factor of 2,
                      associated with a comparable increase in precision and
                      detection limit. As test of actual performance of GHOST
                      results from an in-flight N2O intercomparison with a tunable
                      diode laser absorption spectrometer (TDLAS) are presented.
                      They yield an excellent agreement between both instruments.
                      Furthermore, on the basis of the hitherto most extensive set
                      of upper tropospheric and lower stratospheric data, the
                      relative stratospheric N2O lifetime is re-assessed. When
                      referenced to the WMO reference CFC-11 lifetime of 45 +/- 7
                      years an N2O lifetime of 91 +/- 15 years is derived, a value
                      substantially smaller than the WMO reference lifetime of 120
                      years. Moreover, this value implies a stratospheric N2O sink
                      strength of 16.3 +/- 2.7 Tg (N) yr(-1) which is $30\%$
                      larger than previous estimates.},
      keywords     = {J (WoSType)},
      cin          = {ICG-I},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB47},
      pnm          = {Stratosphärische Chemie},
      pid          = {G:(DE-Juel1)FUEK71},
      shelfmark    = {Environmental Sciences / Meteorology $\&$ Atmospheric
                      Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000168190200003},
      doi          = {10.1023/A:1010789715871},
      url          = {https://juser.fz-juelich.de/record/647},
}