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dc.contributor.authorRäsänen, Janne
dc.contributor.authorHolopainen, Toini
dc.contributor.authorJoutsensaari, Jorma
dc.contributor.authorPasanen, Pertti
dc.contributor.authorKivimäenpää, Minna
dc.date.accessioned2017-06-07T09:09:36Z
dc.date.available2017-06-07T09:09:36Z
dc.date.issued2014
dc.identifier10.1139/cjfr-2014-0068
dc.identifier.issn0045-5067
dc.identifier.urihttps://erepo.uef.fi/handle/123456789/2604
dc.descriptionArticle
dc.description.abstractTrees can remove particulate matter from the atmosphere, improving air quality and providing ecosystem services. Particle removal capacity is known to differ between tree species, but the influence of environmental factors on the removal capacity is still unclear. In this study, we measured particle capture efficiency (Cp) of Norway spruce (Picea abies (L.) Karst.) in wind tunnel experiments under three watering treatments (well watered, moderate drought, and severe drought) and determined needle characteristics (stomatal conductance and density, wax condition, and needle area) that affect particle uptake. Trees were exposed in the wind tunnel to 0.7 μm (geometric mean diameter) NaCl particles with a mass concentration of 1 mg·m−3, and the Cp of the tree was determined for the current-year (C) and previous-year (C+1) needles. Overall, the Cp was significantly higher for C+1 needles than for C needles for all watering treatments. There was also a trend for higher Cp of C+1 needles of less watered trees, but this was not observed for C needles. We suggest that greater erosion of the wax layer of C+1 needles compared with C needles increases hydrophilicity of the C+1 needle surface and this, in interaction with low stomatal conductance, led to the higher Cp.fi_FI
dc.language.isoENfi_FI
dc.publisherNRC Research Pressfi_FI
dc.relation.ispartofseriesCanadian Journal of Forest Research
dc.relation.urihttp://dx.doi.org/10.1139/cjfr-2014-0068fi_FI
dc.rightsAll rights reserved
dc.subjectparticulate matterfi_FI
dc.subjectcapture efficiencyfi_FI
dc.subjectdroughtfi_FI
dc.subjectecosystem servicefi_FI
dc.subjectneedle agefi_FI
dc.titleParticle capture efficiency of different-aged needles of Norway spruce under moderate and severe droughtfi_FI
dc.typehttp://purl.org/eprint/type/JournalArticle
dc.description.versionfinal draft
dc.contributor.departmentSovelletun fysiikan laitos / Sovelletun fysiikan laitoksen toiminta
dc.contributor.departmentYmpäristö- ja biotieteiden laitos / Toiminta
uef.solecris.id27618244
eprint.statushttp://purl.org/eprint/status/PeerReviewedfi_FI
dc.type.publicationinfo:eu-repo/semantics/article
dc.rights.accessrights© NRC Research Press
uef.citationinfo.issue44
uef.citationinfo.pages831-835
dc.relation.doi10.1139/cjfr-2014-0068
dc.description.reviewstatushttp://purl.org/eprint/status/PeerReviewed
dc.format.pagerange831-835
dc.relation.issn0045-5067
dc.relation.issue44
dc.rights.accesslevelopenAccess


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