Show simple item record

dc.contributor.author
Bamberger, Ines
dc.contributor.author
Hörtnagl, Lukas
dc.contributor.author
Walser, Mario
dc.contributor.author
Hansel, Armin
dc.contributor.author
Wohlfahrt, Georg
dc.date.accessioned
2018-09-21T12:56:30Z
dc.date.available
2017-06-11T17:05:10Z
dc.date.available
2018-09-21T12:56:30Z
dc.date.issued
2014
dc.identifier.other
10.5194/bg-11-2429-2014
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/100279
dc.identifier.doi
10.3929/ethz-b-000100279
dc.description.abstract
Up to now the limited knowledge about the exchange of volatile organic compounds (VOCs) between the biosphere and the atmosphere is one of the factors which hinders more accurate climate predictions. Complete long-term flux data sets of several VOCs to quantify the annual exchange and validate recent VOC models are basically not available. In combination with long-term VOC flux measurements the application of gap-filling routines is inevitable in order to replace missing data and make an important step towards a better understanding of the VOC ecosystem–atmosphere exchange on longer timescales. We performed VOC flux measurements above a mountain meadow in Austria during two complete growing seasons (from snowmelt in spring to snow reestablishment in late autumn) and used this data set to test the performance of four different gap-filling routines, mean diurnal variation (MDV), mean gliding window (MGW), look-up tables (LUT) and linear interpolation (LIP), in terms of their ability to replace missing flux data in order to obtain reliable VOC sums. According to our findings the MDV routine was outstanding with regard to the minimization of the gap-filling error for both years and all quantified VOCs. The other gap-filling routines, which performed gap-filling on 24 h average values, introduced considerably larger uncertainties. The error which was introduced by the application of the different filling routines increased linearly with the number of data gaps. Although average VOC fluxes measured during the winter period (complete snow coverage) were close to zero, these were highly variable and the filling of the winter period resulted in considerably higher uncertainties compared to the application of gap-filling during the measurement period. The annual patterns of the overall cumulative fluxes for the quantified VOCs showed a completely different behaviour in 2009, which was an exceptional year due to the occurrence of a severe hailstorm, compared to 2011. Methanol was the compound which, at 381.5 mg C m−2 and 449.9 mg C m−2, contributed most to the cumulative VOC carbon emissions in 2009 and 2011, respectively. In contrast to methanol emissions, however, considerable amounts of monoterpenes (−327.3 mg C m−2) were deposited onto the mountain meadow during 2009 caused by a hailstorm. Other quantified VOCs had considerably lower influences on the annual patterns.
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
Gap-filling strategies for annual VOC flux data sets
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2014-04-30
ethz.journal.title
Biogeosciences
ethz.journal.volume
11
en_US
ethz.journal.issue
8
en_US
ethz.pages.start
2429
en_US
ethz.pages.end
2442
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.notes
See also: http://e-citations.ethbib.ethz.ch/view/pub:121111.
en_US
ethz.identifier.wos
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::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.date.deposited
2017-06-11T17:05:20Z
ethz.source
ECIT
ethz.identifier.importid
imp5936531ea5f9038455
ethz.ecitpid
pub:157205
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T06:04:47Z
ethz.rosetta.lastUpdated
2019-01-02T14:11:12Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Gap-filling%20strategies%20for%20annual%20VOC%20flux%20data%20sets&rft.jtitle=Biogeosciences&rft.date=2014&rft.volume=11&rft.issue=8&rft.spage=2429&rft.epage=2442&rft.au=Bamberger,%20Ines&H%C3%B6rtnagl,%20Lukas&Walser,%20Mario&Hansel,%20Armin&Wohlfahrt,%20Georg&rft.genre=article&
 Search via SFX

Files in this item

Thumbnail

Publication type

Show simple item record