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@ARTICLE{Wei:866410,
      author       = {Wei, Jing and Ibraim, Erkan and Brüggemann, Nicolas and
                      Vereecken, Harry and Mohn, Joachim},
      title        = {{F}irst real-time isotopic characterisation of {N}2{O} from
                      chemodenitrification},
      journal      = {Geochimica et cosmochimica acta},
      volume       = {267},
      issn         = {0016-7037},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2019-05563},
      pages        = {17-32},
      year         = {2019},
      abstract     = {Chemodenitrification can be a substantial abiotic source of
                      nitrous oxide (N2O) in soil. The isotopic signature of N2O
                      from this process could support source partitioning, but it
                      is currently unknown in sufficient detail. In this study, we
                      determined the isotopic composition of N2O, produced by the
                      reaction of nitrite (NO2−) with lignin, four lignin
                      derivatives, and three types of soils, online with a quantum
                      cascade laser absorption spectrometer (QCLAS). We present
                      the first dataset of continuous measurements of δ15Nbulk
                      (δ15Nbulk ≡ (δ15Nα + δ15Nβ)/2), δ18O, and
                      site preference (SPN2O,
                      SPN2O ≡ δ15Nα − δ15Nβ) of N2O from
                      chemodenitrification in both chemical assays and soils.
                      Considerable amounts of N2O were produced by chemical
                      reduction of NO2−, indicating that chemodenitrification
                      could dominate N2O emission in NO2−-rich environments. The
                      values of SPN2O varied by more than 20‰ in the reactions
                      of sodium nitrite with organic substances. Contrary to the
                      common assumption that SPN2O values are constant for a
                      distinct N2O source process, our results reveal a
                      considerable shift in SPN2O over time for most experiments.
                      The large SPN2O variability might be explained by the
                      multiple pathways with hyponitrous acid or nitramide as N2O
                      precursors. These findings provide important new information
                      to improve our understanding about the dependency of N2O
                      isotopic signatures on N2O production processes.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000491872600002},
      doi          = {10.1016/j.gca.2019.09.018},
      url          = {https://juser.fz-juelich.de/record/866410},
}