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Forest Science Database

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Abstract

Tree-ring chronologies are commonly extended back in time by combining samples from living trees with relict material preserved in man-made structures or natural archives (e.g. lakes). Although spatially close, these natural archives and living-tree-sites often comprise different micro-climates....

Author(s)
Düthorn, E.; Schneider, L.; Konter, O.; Schön, P.; Timonen, M.; Esper, J.
Publisher
Finnish Society of Forest Science, Helsinki, Finland
Citation
Silva Fennica, 2015, 49, 1, pp 1220
Abstract

Although not yet fully understood, reduced sensitivity of tree growth to temperature at high northern latitudes during the last ∼40 years is often linked to concurrent anthropogenic changes of atmospheric composition and global warming. The idea that a temporal localization of the problem could...

Author(s)
Schneider, L.; Esper, J.; Timonen, M.; Büntgen, U.
Publisher
Wiley-Blackwell, Copenhagen, Denmark
Citation
Oikos, 2014, 123, 5, pp 559-566
Abstract

For the first time we identify the peculiarities of the effect of the most powerful (VEI >5) volcanic eruptions on the regional climate of the Murmansk region on the basis of Kola Peninsula dendrochronological data for a period of more than 560 years. The analysis was based on the tree-ring...

Author(s)
Kasatkina, E. A.; Shumilov, O. I.; Timonen, M.; Kanatjev, A. G.
Publisher
MAIK Nauka/Interperiodica Publishing, Moscow, Russia
Citation
Izvestiya, Atmospheric and Oceanic Physics, 2013, 49, 4, pp 432-438
AbstractFull Text

Tree-ring data is commonly used in forest science and dendrochronology. As the collected datasets represent restricted populations of theoretical infinite sample size, an interesting question deals with the sample selection that is carried out during the fieldwork and through the data analyses....

Author(s)
Timonen, M.; Mielikäinen, K.; Helama, S.
Publisher
Institute of Forestry and Rural Engineering, Estonian Agricultural University, Tartu, Estonia
Citation
Forestry Studies / Metsanduslikud Uurimused, 2012, 56, pp 5-15
Abstract

The common growth signal and spatial synchrony of nine chronologies of tree rings (Pinus sylvestris L.) from the Baltic Sea region were studied using moving correlations with time windows of 50 and 100 years. Drifts from synchrony to asynchrony and again back to synchrony across several centuries...

Author(s)
Läänelaid, A.; Helama, S.; Kull, A.; Timonen, M.; Jaagus, J.
Publisher
Elsevier GmbH, München, Germany
Citation
Dendrochronologia, 2012, 30, 2, pp 147-155
Abstract

The paper deals with the analysis of the external factor (solar activity, volcanic eruptions) influence on tree growth at the Kola Peninsula, northwestern Russia. Pinus sylvestris L. (Scots pine) tree-ring chronologies collected nearby the northern timberline (68.63N, 33.25E) include the oldest...

Author(s)
Shumilov, O. I.; Kasatkina, E. A.; Mielikainen, K.; Timonen, M.; Kanatjev, A. G.
Publisher
Graduate Faculty of Environment, University of Tehran, Tehran, Iran
Citation
International Journal of Environmental Research, 2011, 5, 4, pp 855-864
Abstract

Reindeer (Rangifer tarandus) lichen grazing enhanced Scots pine (Pinus sylvestris) growth in a northeastern Fennoscandian forest (eastern Finnish Lapland). Lichen mat removal by grazing in a previously ungrazed area increased soil versus air temperature coupling. This caused faster soil spring...

Author(s)
Fauria, M. M.; Helle, T.; Niva, A.; Posio, H.; Timonen, M.
Publisher
National Research Council of Canada, Ottawa, Canada
Citation
Canadian Journal of Forest Research, 2008, 38, 12, pp 2981-2993
Abstract

For a long time, tree-rings have been thought of as containing almost no variation at timescales of centuries and millennia, i.e. at low frequencies. Here, we show that this might be an issue of data analysis rather than an actual lack of variability. A data set of subfossil and living Scots pines...

Author(s)
Helama, S.; Timonen, M.; Lindholm, M.; Meriläinen, J.; Eronen, M.
Publisher
John Wiley & Sons, Chichester, UK
Citation
International Journal of Climatology, 2005, 25, 13, pp 1767-1779
Abstract

This study, initiated in 2001, aimed to describe the past forest fire events in the Urho Kekkonen National Park in eastern Lapland, Finland, with as good spatial and temporal resolution as possible. Scots pine [Pinus sylvestris] was the dominant tree species in the study area except in the upper...

Author(s)
Kauhanen, H.; Lehtonen, H.; Ovaskainen, R.; Timonen, M.
Publisher
Estonian Agricultural University, Tartu, Estonia
Citation
Transactions of the Faculty of Forestry, Estonian Agricultural University, 2004, No.37, pp 97-99
Abstract

We performed a spatiotemporal analysis of a network of 21 Scots pine (Pinus sylvestris) ring-width chronologies in northern Fennoscandia by means of chronology statistics and multivariate analyses. Chronologies are located on both sides (western and eastern) of the Scandes Mountains (67°N-70°N,...

Author(s)
Macias, M.; Timonen, M.; Kirchhefer, A. J.; Lindholm, M.; Eronen, M.; Gutiérrez, E.
Publisher
Institute of Arctic and Alpine Research, Boulder, USA
Citation
Arctic, Antarctic, and Alpine Research, 2004, 36, 4, pp 565-574

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