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dc.contributor.authorLaffineur, Q.
dc.contributor.authorAubinet, M.
dc.contributor.authorSchoon, N.
dc.contributor.authorAmelynck, C.
dc.contributor.authorMuller, J.-F.
dc.contributor.authorDewulf, J.
dc.contributor.authorVan Langenhove, H.
dc.contributor.authorSteppe, K.
dc.contributor.authorSimpraga, M.
dc.contributor.authorHeinesch, B.
dc.date2011
dc.date.accessioned2016-03-29T12:43:52Z
dc.date.available2016-03-29T12:43:52Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3089
dc.descriptionWe measured the isoprene and monoterpene fluxes continuously above a mixed forest site at Vielsalm in the eastern part of Belgium, using the disjunct eddy covariance technique with proton transfer reaction-mass spectrometry. Simultaneously, we also measured the carbon dioxide fluxes in order to deduce the gross primary production. The measurements were conducted from July to September 2009. During the day, the seasonal evolution of the isoprene/monoterpene emissions was studied using a monthly temperature and light dependence function deduced from our results to standardize the fluxes. A seasonal decrease in the standard emission factors was observed, probably linked to acclimation or senescence. The standard emission factor for isoprene fluxes (30 °C, 1000 μmol m−2 s−1) fell from 0.91 ± 0.01 to 0.56 ± 0.02 μg m−2 s−1 and for monoterpene fluxes from 0.74 ± 0.03 to 0.27 ± 0.03 μg m−2 s−1. During the night, a slight positive flux of monoterpenes was observed that seemed to be driven by air temperature. The standard emission factor (30°C) for nighttime monoterpene fluxes was equal to 0.093 ± 0.019 μg m−2 s−1. Finally, we studied the seasonal evolution of the relationship between the gross primary production and the isoprene/monoterpenes fluxes. A linear relationship was observed, highlighting the strong link between carbon assimilation and isoprene/monoterpene emissions.
dc.languageeng
dc.titleIsoprene and monoterpene emissions from a mixed temperate forest
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeEddy covariance
dc.subject.freeForest ecosystem
dc.subject.freeIsoprene
dc.subject.freeMonoterpenes
dc.subject.freePTR-MS
dc.subject.freeCarbon dioxide
dc.subject.freeCharge transfer
dc.subject.freeForestry
dc.subject.freeMass spectrometry
dc.subject.freeStandards
dc.subject.freeEcosystems
dc.subject.freecarbon dioxide
dc.subject.freeisoprene
dc.subject.freeterpene derivative
dc.subject.freecarbon dioxide
dc.subject.freecarbon emission
dc.subject.freeeddy covariance
dc.subject.freeindustrial emission
dc.subject.freeisoprene
dc.subject.freemass spectrometry
dc.subject.freemixed forest
dc.subject.freemonoterpene
dc.subject.freeprimary production
dc.subject.freetemperate forest
dc.subject.freearticle
dc.subject.freemass spectrometry
dc.subject.freepriority journal
dc.subject.freetemperate deciduous forest
dc.subject.freeCarbon Dioxide
dc.subject.freeCharge Transfer
dc.subject.freeEcosystems
dc.subject.freeForestry
dc.subject.freeIsoprene
dc.subject.freeMass Spectrometers
dc.subject.freeStandards
dc.subject.freeBelgium
dc.source.titleAtmospheric Environment
dc.source.volume45
dc.source.issue18
dc.source.page3157-3168
Orfeo.peerreviewedYes
dc.identifier.doi10.1016/j.atmosenv.2011.02.054
dc.identifier.scopus2-s2.0-79955021418


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