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@ARTICLE{Heil:153891,
      author       = {Heil, Jannis and Wolf, Benjamin and Brüggemann, Nicolas
                      and Emmenegger, Lukas and Tuzson, Béla and Vereecken, Harry
                      and Mohn, Joachim},
      title        = {{S}ite-specific 15{N} isotopic signatures of abiotically
                      produced {N}$_{2}${O}},
      journal      = {Geochimica et cosmochimica acta},
      volume       = {139},
      issn         = {0016-7037},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2014-03362},
      pages        = {72 - 82},
      year         = {2014},
      abstract     = {Efficient nitrous oxide (N2O) mitigation strategies require
                      the identification of the main source and sink processes and
                      their contribution to total soil N2O production. Several
                      abiotic reactions of nitrification intermediates leading to
                      N2O production are known, but their contribution to total
                      N2O production in soils is uncertain. As the site preference
                      (SP) of 15N in N2O is a promising tool to give more insight
                      into N2O production processes, we investigated the SP of N2O
                      produced by different abiotic reactions in a laboratory
                      study. All reactions involved the nitrification intermediate
                      hydroxylamine (NH2OH) in combination with nitrite (NO2−),
                      Fe3+, Fe2+ and Cu2+, reactants commonly or potentially found
                      in soils, at different concentrations and pH values. N2O
                      production and its four main isotopic species (14N14N16O,
                      15N14N16O, 14N15N16O, and 14N14N18O) were quantified
                      simultaneously and online at high temporal resolution using
                      quantum cascade laser absorption spectroscopy. Thereby, our
                      study presents the first continuous analysis of δ18O in
                      N2O. The experiments revealed the possibility of purely
                      abiotic reactions over a wide range of acidity (pH 3–8) by
                      different mechanisms. All studied abiotic pathways produced
                      N2O with a characteristic SP in the range of 34–35‰,
                      unaffected by process conditions and remaining constant over
                      the course of the experiments. These findings reflect the
                      benefit of continuous N2O isotopic analysis by laser
                      spectroscopy, contribute new information to the challenging
                      source partitioning of N2O emissions from soils, and
                      emphasize the potentially significant role of coupled
                      biotic–abiotic reactions in soils.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {246 - Modelling and Monitoring Terrestrial Systems: Methods
                      and Technologies (POF2-246) / 255 - Terrestrial Systems:
                      From Observation to Prediction (POF3-255)},
      pid          = {G:(DE-HGF)POF2-246 / G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000339176400004},
      doi          = {10.1016/j.gca.2014.04.037},
      url          = {https://juser.fz-juelich.de/record/153891},
}