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dc.contributor.authorOls, Clementine
dc.contributor.authorKålås, Ingvil Henden
dc.contributor.authorDrobyshev, Igor
dc.contributor.authorSöderström, Lars
dc.contributor.authorHofgaard, Annika
dc.identifier.citationOls, C., Kålås, I. H., Drobyshev, I., Söderström, L. & Hofgaard, A. (2019). Spatiotemporal variation in the relationship between boreal forest productivity proxies and climate data. Dendrochronologia 58: 125648. doi:en_US
dc.descriptionAuthor's accepted version (postprint).en_US
dc.descriptionThis is an Accepted Manuscript of an article published by Elsevier in Dendrochronologia on 06/11/2019.
dc.descriptionAvailable online:
dc.description.abstractThe impacts of climate change on high-latitude forest ecosystems are still uncertain. Divergent forest productivity trends have recently been reported both at the local and regional level challenging the projections of boreal tree growth dynamics. The present study investigated (i) the responses of different forest productivity proxies to monthly climate (temperature and precipitation) through space and time; and (ii) the local coherency between these proxies through time at four high-latitude boreal Scots pine sites (coastal and inland) in Norway. Forest productivity proxies consisted of two proxies representing stem growth dynamics (radial and height growth) and one proxy representing canopy dynamics (cumulative May-to-September Normalized Difference Vegetation Index (NDVI)). Between-proxy and climate-proxy correlations were computed over the 1982–2011 period and over two 15-yr sub-periods. Over the entire period, radial growth significantly correlated with current year July temperature, and height growth and cumulative NDVI significantly correlated with previous and current growing season temperatures. Significant climate responses were quite similar across sites, despite some higher sensitivity to non-growing season climate at inland sites. Significant climate-proxy correlations identified over the entire period were temporarily unstable. Local coherency between proxies was generally insignificant. The spatiotemporal instability in climate-proxy correlations observed for all proxies underlines evolving responses to climate and challenges the modelling of forest productivity. The general lack of local coherency between proxies at our four study sites suggests that forest productivity estimations based on a single proxy should be considered with great caution. The combined use of different forest growth metrics may help circumvent uncertainties in capturing responses of forest productivity to climate variability and improve estimations of carbon sequestration by forest ecosystems.en_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.titleSpatiotemporal variation in the relationship between boreal forest productivity proxies and climate dataen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488en_US
dc.relation.projectThe Norwegian Research Council: 260400en_US
dc.relation.projectThe Norwegian Research Council: 160022en_US
dc.relation.projectNordic Council of Ministers: 12262en_US

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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal