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@ARTICLE{Warneke:52928,
      author       = {Warneke, T. and Meirink, J. F. and Begamaschi, P. and
                      Grooß, J.-U. and Notholt, J. and Toon, G. C. and Velazco,
                      V. and Goede, A.P.H. and Schrems, O.},
      title        = {{S}easonal an latitudinal variation of atmospheric methane:
                      {A} ground-based an ship-borne solar {IR} spectroscopic
                      study},
      journal      = {Geophysical research letters},
      volume       = {33},
      issn         = {0094-8276},
      address      = {Washington, DC},
      publisher    = {American Geophysical Union},
      reportid     = {PreJuSER-52928},
      pages        = {L14812},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Column-averaged volume mixing ratios of CH4 were retrieved
                      with a precision of better than $0.5\%$ from infrared solar
                      absorption spectra obtained at Ny-Alesund ( Spitsbergen, 79
                      degrees N) between 1997 and 2004 and during two ship cruises
                      (54 degrees N - 34 degrees S) on the Atlantic in 2003. The
                      retrieval has been performed in a spectral region available
                      to all operational FTIR ( Fourier Transform InfraRed)
                      spectrometers performing solar absorption measurements. The
                      seasonality and the long-term increase of the tropospheric
                      volume-mixing ratio, derived from the infrared measurements
                      agree well with data from surface sampling at this site. The
                      latitudinal variation of ship-borne measurements between 54
                      degrees N and 34 degrees S is in agreement with inverse
                      model simulations which are optimized vs. the global
                      NOAA/ESRL measurements.},
      keywords     = {J (WoSType)},
      cin          = {ICG-I},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB47},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      shelfmark    = {Geosciences, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000239489000001},
      doi          = {10.1029/2006GL025874},
      url          = {https://juser.fz-juelich.de/record/52928},
}