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dc.contributor.author
Brümmer, Christian
dc.contributor.author
Marx, Oliver
dc.contributor.author
Kutsch, Werner L.
dc.contributor.author
Ammann, Christof
dc.contributor.author
Wolff, Veronika
dc.contributor.author
Flechard, Christophe R.
dc.contributor.author
Freibauer, Annette
dc.date.accessioned
2019-11-22T16:45:20Z
dc.date.available
2017-06-10T14:57:18Z
dc.date.available
2019-11-22T16:45:20Z
dc.date.issued
2013
dc.identifier.issn
0280-6509
dc.identifier.issn
1600-0889
dc.identifier.other
10.3402/tellusb.v65i0.19770
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/64739
dc.identifier.doi
10.3929/ethz-b-000064739
dc.description.abstract
The amount and timing of reactive nitrogen exchange between agricultural land and the atmosphere play a key role in evaluating ecosystem productivity and in addressing atmospheric nitrogen budgets and transport. With the recent development of the Total Reactive Atmospheric Nitrogen Converter (TRANC) apparatus, a methodology has been provided for continuous measurement of the sum of all airborne nitrogen containing species (ΣNr) allowing for diurnal and seasonal investigations. We present ΣNr concentration and net flux data from an 11-month field campaign conducted at an arable field using the TRANC system within an eddy-covariance setup. Clear diurnal patterns of both ΣNr concentrations and fluxes with significant dependencies on atmospheric stability and stomatal regulation were observed in the growing season. TRANC data were compared with monthly-averaged concentrations and dry deposition rates of selected Nr compounds using DELTA denuders and ensemble-averages of four inferential models, respectively. Similar seasonal trends were found for Nr concentrations from DELTA and TRANC measurements with values from the latter being considerably higher than those of DELTA denuders. The variability of the difference between these two systems could be explained by seasonally changing source locations of NOx contributions to the TRANC signal. As soil and vegetation Nr emissions to the atmosphere are generally not treated by inferential (dry deposition) models, TRANC data showed lower monthly deposition rates than those obtained from inferential modelling. Net ΣNr exchange was almost neutral (~0.072 kg N ha−1) at the end of the observation period. However, during most parts of the year, slight but permanent net ΣNr deposition was found. Our measurements demonstrate that fertilizer addition followed by substantial ΣNr emissions plays a crucial role in a site's annual atmospheric nitrogen budget. As long-term Nr measurements with high temporal resolution are usually cost and labour-intensive, field application of the TRANC helps improve the understanding of ecosystem functioning, atmospheric transport and revising definitions of ecosystem-specific critical loads at a relatively moderate operational cost level.
en_US
dc.format
application/pdf
dc.language.iso
en
en_US
dc.publisher
International Meteorological Institute in Stockholm
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc/3.0/
dc.subject
Agricultural land
en_US
dc.subject
biosphere-atmosphere exchange
en_US
dc.subject
Converter
en_US
dc.subject
Ecosystem N saturation
en_US
dc.subject
Eddy covariance
en_US
dc.subject
Fertilization
en_US
dc.subject
N budget
en_US
dc.subject
TRANC
en_US
dc.subject
Zotal reactive nitrogen (Sigma N-r) exchange
en_US
dc.title
Fluxes of total reactive atmospheric nitrogen (Sigma N-r) using eddy covariance above arable land
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial 3.0 Unported
dc.date.published
2013-02-25
ethz.journal.title
Tellus B: Chemical and Physical Meteorology
ethz.journal.volume
65
en_US
ethz.journal.issue
1
en_US
ethz.pages.start
19770
en_US
ethz.size
20 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
000017639
ethz.publication.place
Stockholm
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-10T14:59:18Z
ethz.source
ECIT
ethz.identifier.importid
imp5936506e81eb829366
ethz.ecitpid
pub:102963
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-14T12:23:43Z
ethz.rosetta.lastUpdated
2022-03-29T00:20:22Z
ethz.rosetta.versionExported
true
ethz.COinS
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