Determination of the carbon budget of a pasture: effect of system boundaries and flux uncertainties
dc.contributor.author
Felber, Raphael
dc.contributor.author
Bretscher, Daniel
dc.contributor.author
Münger, Andreas
dc.contributor.author
Neftel, Albrecht
dc.contributor.author
Ammann, Christof
dc.date.accessioned
2018-10-01T15:17:30Z
dc.date.available
2017-06-12T06:33:55Z
dc.date.available
2018-10-01T15:17:30Z
dc.date.issued
2016
dc.identifier.issn
1726-4170
dc.identifier.issn
1726-4170
dc.identifier.other
10.5194/bg-13-2959-2016
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/116805
dc.identifier.doi
10.3929/ethz-b-000116805
dc.description.abstract
Carbon (C) sequestration in the soil is considered as a potential important mechanism to mitigate greenhouse gas (GHG) emissions of the agricultural sector. It can be quantified by the net ecosystem carbon budget (NECB) describing the change of soil C as the sum of all relevant import and export fluxes. NECB was investigated here in detail for an intensively grazed dairy pasture in Switzerland. Two budget approaches with different system boundaries were applied: NECBtot for system boundaries including the grazing cows and NECBpast for system boundaries excluding the cows. CO2 and CH4 exchange induced by soil/vegetation processes as well as direct emissions by the animals were derived from eddy covariance measurements. Other C fluxes were either measured (milk yield, concentrate feeding) or derived based on animal performance data (intake, excreta). For the investigated year, both approaches resulted in a small near-neutral C budget: NECBtot −27±62 and NECBpast 23±76gCm−2yr−1. The considerable uncertainties, depending on the approach, were mainly due to errors in the CO2 exchange or in the animal-related fluxes. The comparison of the NECB results with the annual exchange of other GHG revealed CH4 emissions from the cows to be the major contributor in terms of CO2 equivalents, but with much lower uncertainty compared to NECB. Although only 1year of data limit the representativeness of the carbon budget results, they demonstrate the important contribution of the non-CO2 fluxes depending on the chosen system boundaries and the effect of their propagated uncertainty in an exemplary way. The simultaneous application and comparison of both NECB approaches provides a useful consistency check for the carbon budget determination and can help to identify and eliminate systematic errors.
en_US
dc.format
application/pdf
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Determination of the carbon budget of a pasture: effect of system boundaries and flux uncertainties
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2016-05-19
ethz.journal.title
Biogeosciences
ethz.journal.volume
13
en_US
ethz.journal.issue
10
en_US
ethz.pages.start
2959
en_US
ethz.pages.end
2969
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
006289717
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::03428 - Kreuzer, Michael (emeritus) / Kreuzer, Michael (emeritus)
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::03428 - Kreuzer, Michael (emeritus) / Kreuzer, Michael (emeritus)
ethz.relation.isSupplementedBy
10.5194/bg-13-2959-2016-supplement
ethz.date.deposited
2017-06-12T06:34:08Z
ethz.source
ECIT
ethz.identifier.importid
imp5936546ca8e5f59080
ethz.ecitpid
pub:178692
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-25T11:16:13Z
ethz.rosetta.lastUpdated
2022-03-28T21:23:54Z
ethz.rosetta.versionExported
true
ethz.COinS
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