Show simple item record

dc.contributor.author
Wolf, Benjamin
dc.contributor.author
Merbold, Lutz
dc.contributor.author
Decock, Charlotte
dc.contributor.author
Tuzson, Béla
dc.contributor.author
Harris, Eliza
dc.contributor.author
Six, Johan
dc.contributor.author
Emmenegger, Lukas
dc.contributor.author
Mohn, Joachim
dc.date.accessioned
2022-06-21T07:53:09Z
dc.date.available
2017-06-11T17:28:32Z
dc.date.available
2018-11-06T16:09:36Z
dc.date.available
2022-06-21T07:53:09Z
dc.date.issued
2015-01-23
dc.identifier.issn
1810-6277
dc.identifier.issn
1810-6285
dc.identifier.other
10.5194/bgd-12-1573-2015
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/100963
dc.identifier.doi
10.3929/ethz-b-000100963
dc.description.abstract
The analysis of the four main isotopic N2O species (14N14N16O, 14N15N16O, 15N14N16O, 14N14N18O) and especially the intramolecular distribution of 15N ("site preference", SP) has been suggested as a tool to distinguish source processes and to help constrain the global N2O budget. However, current studies suffer from limited spatial and temporal resolution capabilities due to the combination of discrete flask sampling with subsequent laboratory-based mass-spectrometric analysis. Quantum cascade laser absorption spectroscopy (QCLAS) allows the selective high-precision analysis of N2O isotopic species at trace levels and is suitable for in situ measurements. Here, we present results from the first field campaign, conducted on an intensively managed grassland site in central Switzerland. N2O mole fractions and isotopic composition were determined in the atmospheric surface layer (at 2.2 m height) at a high temporal resolution with a modified state-of-the-art laser spectrometer connected to an automated N2O preconcentration unit. The analytical performance was determined from repeated measurements of a compressed air tank and resulted in measurement repeatability of 0.20, 0.12 and 0.11‰ for δ15Nα, δ15Nβ and δ18O, respectively. Simultaneous eddy-covariance N2O flux measurements were used to determine the flux-averaged isotopic signature of soil-emitted N2O. Our measurements indicate that, in general, nitrifier-denitrification and denitrification were the prevalent sources of N2O during the campaign and that variations in isotopic composition were due to alterations in the extent to which N2O was reduced to N2 rather than to other pathways, such as hydroxylamine oxidation. Management and rewetting events were characterized by low values of the intramolecular 15N site preference (SP), δ15Nbulk and δ18O, suggesting that nitrifier-denitrification and incomplete heterotrophic bacterial denitrification responded most strongly to the induced disturbances. The flux-averaged isotopic composition of N2O from intensively managed grassland was 6.9 ± 4.3, −17.4 ± 6.2 and 27.4 ± 3.6‰ for SP, δ15Nbulk and δ18O, respectively. The approach presented here is capable of providing long-term data sets also for other N2O-emitting ecosystems, which can be used to further constrain global N2O inventories
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
First on-line isotopic characterization of N2O emitted from intensively managed grassland
en_US
dc.type
Working Paper
dc.rights.license
Creative Commons Attribution 3.0 Unported
ethz.journal.title
Biogeosciences Discussions
ethz.journal.volume
12
en_US
ethz.journal.issue
8
en_US
ethz.journal.abbreviated
Biogeosci. discuss.
ethz.pages.start
1573
en_US
ethz.pages.end
1611
en_US
ethz.notes
Full text final version replaced with preprint version on June 21, 2022.
en_US
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03982 - Six, Johan / Six, Johan
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03648 - Buchmann, Nina / Buchmann, Nina
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03648 - Buchmann, Nina / Buchmann, Nina
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03982 - Six, Johan / Six, Johan
ethz.relation.isPreviousVersionOf
10.3929/ethz-b-000104341
ethz.date.deposited
2017-06-11T17:28:48Z
ethz.source
ECIT
ethz.identifier.importid
imp5936532e345b672032
ethz.ecitpid
pub:158610
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-18T10:26:52Z
ethz.rosetta.lastUpdated
2021-02-15T02:24:54Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=First%20on-line%20isotopic%20characterization%20of%20N2O%20emitted%20from%20intensively%20managed%20grassland&rft.jtitle=Biogeosciences%20Discussions&rft.date=2015-01-23&rft.volume=12&rft.issue=8&rft.spage=1573&rft.epage=1611&rft.issn=1810-6277&1810-6285&rft.au=Wolf,%20Benjamin&Merbold,%20Lutz&Decock,%20Charlotte&Tuzson,%20B%C3%A9la&Harris,%20Eliza&rft.genre=preprint&rft_id=info:doi/10.5194/bgd-12-1573-2015&
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record