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@ARTICLE{Schmitgen:40851,
      author       = {Schmitgen, S. and Geiss, H. and Ciais, Ph. and Neininger,
                      B. and Brunet, Y. and Reichstein, M. and Kley, D. and
                      Volz-Thomas, A.},
      title        = {{C}arbon dioxide uptake of a forested region in southwest
                      {F}rance derived from airborne {CO}2 and {CO} measurements
                      in a quasi-{L}agrangian experiment},
      journal      = {Journal of Geophysical Research},
      volume       = {109},
      issn         = {0148-0227},
      address      = {Washington, DC},
      publisher    = {Union},
      reportid     = {PreJuSER-40851},
      pages        = {D14302},
      year         = {2004},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {This paper presents a Lagrangian budgeting approach to
                      quantify the uptake of CO2 by vegetation at horizontal
                      scales of several tens of kilometers. For this purpose, CO2
                      and meteorological parameters were measured from a small
                      aircraft during four flights in June 2001 over a flat
                      homogeneous and productive temperate forest in the Landes
                      region ( southwestern France). Additional CO measurements
                      were made in order to identify and quantify the potential
                      influence of anthropogenic emissions on the net CO2 flux
                      derived from the measurements. For one of four flights,
                      Lagrangian conditions were nearly perfectly fulfilled. On
                      average, the CO2 mixing ratio in the boundary layer
                      decreased at a rate of 0.11 ppm km(-1), yielding an average
                      CO2 uptake by the forest of 16 +/- 2.5 mumol m(-2) s(-1)
                      between 1230 and 1430 UT. Our result is about $15\%$ smaller
                      than the local net ecosystem exchange measured by eddy
                      covariance at a tower north of the flight domain and about
                      $12\%$ higher than a regional estimate based on remote
                      sensing data for the whole experimental area. The
                      contribution of anthropogenic emissions to the regional CO2
                      budget was estimated from the CO measurements to be to <0.5
                      mu mol m(-2) s(-1).},
      keywords     = {J (WoSType)},
      cin          = {ICG-II},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB48},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000223189800001},
      doi          = {10.1029/2003JD004335},
      url          = {https://juser.fz-juelich.de/record/40851},
}