Show simple item record

dc.contributor.authorOls, Clementine
dc.contributor.authorGirardin, Martin P.
dc.contributor.authorHofgaard, Annika
dc.contributor.authorBergeron, Yves
dc.contributor.authorDrobyshev, Igor
dc.coverage.spatialEastern boreal North Americanb_NO
dc.date.accessioned2017-12-07T10:05:49Z
dc.date.available2017-12-07T10:05:49Z
dc.date.created2017-11-28T11:16:06Z
dc.date.issued2017
dc.identifier.issn1432-9840
dc.identifier.urihttp://hdl.handle.net/11250/2469531
dc.description.abstractThe growth of high-latitude temperature-limited boreal forest ecosystems is projected to become more constrained by soil water availability with continued warming. The purpose of this study was to document ongoing shifts in tree growth sensitivity to the evolving local climate in unmanaged black spruce (Picea mariana (Miller) B.S.P.) forests of eastern boreal North America (49_N–52_N, 58_W– 82_W) using a comparative study of field and modeled data. We investigated growth relationships to climate (gridded monthly data) from observed (50 site tree-ring width chronologies) and simulated growth data (stand-level forest growth model) over 1908–2013. No clear strengthening of moisture control over tree growth in recent decades was detected. Despite climate warming, photosynthesis (main driver of the forest growth model) and xylem production (main driver of radial growth) have remained temperature-limited. Analyses revealed, however, a weakening of the influence of growing season temperature on growth during the mid- to late twentieth century in the observed data, particularly in high-latitude (> 51.5_N) mountainous sites. This shift was absent from simulated data, which resulted in clear model-data desynchronization. Thorough investigations revealed that desynchronization was mostly linked to the quality of climate data, with precipitation data being of particular concern. The scarce network of weather stations over eastern boreal North America (> 51.5_N) affects the accuracy of estimated local climate variability and critically limits our ability to detect climate change effects on high-latitude ecosystems, especially at high altitudinal sites. Climate estimates from remote sensing could help address some of these issues in the future. boreal forests; North America; forest growth models; climate change; climate–growth relationships; black spruce; Picea mariana.nb_NO
dc.language.isoengnb_NO
dc.subjectboreal forestsnb_NO
dc.subjectNorth Americanb_NO
dc.subjectforest growth modelsnb_NO
dc.subjectclimate changenb_NO
dc.subjectclimate–growth relationshipsnb_NO
dc.subjectblack sprucenb_NO
dc.subjectPicea mariananb_NO
dc.titleMonitoring climate sensitivity shifts in tree-rings of Eastern Boreal North America using model-data comparison. Shifts in tree growth sensivity to climatenb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480nb_NO
dc.subject.nsiVDP::Zoology and botany: 480nb_NO
dc.source.journalEcosystems (New York. Print)nb_NO
dc.identifier.doi10.1007/s10021-017-0203-3
dc.identifier.cristin1519404
dc.relation.projectNorges forskningsråd: 160022nb_NO
dc.relation.projectAndre: NSERC Strategic and Discovery Grantsnb_NO
dc.relation.projectAndre: Nordic Forest Research Cooperation Committee (SNS)nb_NO
dc.relation.projectAndre: Canadian Forest Service (CFS)nb_NO
cristin.unitcode7511,2,0,0
cristin.unitnameAvdeling for terrestrisk økologi
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record