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@ARTICLE{Wu:868419,
author = {Wu, Di and Well, Reinhard and Cárdenas, Laura M. and Fuß,
Roland and Lewicka-Szczebak, Dominika and Köster, Jan Reent
and Brüggemann, Nicolas and Bol, Roland},
title = {{Q}uantifying {N}2{O} reduction to {N}2 during
denitrification in soils via isotopic mapping approach:
{M}odel evaluation and uncertainty analysis},
journal = {Environmental research},
volume = {179},
number = {Part A},
issn = {0013-9351},
address = {San Diego, Calif.},
publisher = {Elsevier},
reportid = {FZJ-2020-00022},
pages = {108806 -},
year = {2019},
abstract = {The last step of denitrification, i.e. the reduction of N2O
to N2, has been intensively studied in the laboratory to
understand the denitrification process, predict nitrogen
fertiliser losses, and to establish mitigation strategies
for N2O. However, assessing N2 production via
denitrification at large spatial scales is still not
possible due to lack of reliable quantitative approaches.
Here, we present a novel numerical “mapping approach”
model using the δ15Nsp/δ18O slope that has been proposed
to potentially be used to indirectly quantify N2O reduction
to N2 at field or larger spatial scales. We evaluate the
model using data obtained from seven independent soil
incubation studies conducted under a He–O2 atmosphere.
Furthermore, we analyse the contribution of different
parameters to the uncertainty of the model. The model
performance strongly differed between studies and incubation
conditions. Re-evaluation of the previous data set
demonstrated that using soils-specific instead of default
endmember values could largely improve model performance.
Since the uncertainty of modelled N2O reduction was
relatively high, further improvements to estimate model
parameters to obtain more precise estimations remain an
on-going matter, e.g. by determination of soil-specific
isotope fractionation factors and isotopocule endmember
values of N2O production processes using controlled
laboratory incubations. The applicability of the mapping
approach model is promising with an increasing availability
of real-time and field based analysis of N2O isotope
signatures.},
cin = {IBG-3},
ddc = {610},
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},
pubmed = {pmid:31627026},
UT = {WOS:000497259100015},
doi = {10.1016/j.envres.2019.108806},
url = {https://juser.fz-juelich.de/record/868419},
}