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Forest Science Database

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Abstract

Boreal forests are highly sensitive to climate and human impacts and therefore suitable as biological indicator for environmental changes. In this context, our study was aimed at getting deeper insight into the climate-dependence of the onset, intensity and end of wood formation of Scots pine...

Author(s)
Seo JeongWook; Eckstein, D.; Jalkanen, R.; Schmitt, U.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Environmental and Experimental Botany, 2011, 72, 3, pp 422-431
Abstract

Annual height increments of 35 Scots pine (Pinus sylvestris L.) trees from the northern timberline (68°30′N, 27°30′E, 220 m a.s.l., Laanila, North Finland) and monthly climate data from two meteorological stations, Sodankylä (from 1908 to present) and Ivalo (from 1958 to present) were used in...

Author(s)
Lindholm, M.; Jalkanen, R.; Salminen, H.
Publisher
Elsevier GmbH, Jena, Germany
Citation
Dendrochronologia, 2009, 27, 2, pp 113-119
AbstractFull Text

Needle trace method retrospectively records the needle age at the time of its fall-off and studies the influence of the environmental and biotic factors on needle proxies. Data on height increments and number of needle traces in tree-rings of individual growth shoot are collected. With needle...

Author(s)
Poljanšek, S.; Oven, P.; Jalkanen, R.; Levanič, T.
Publisher
Gozdarski Inštitut Slovenije, Univerza v Ljubljani, Biotehniška Fakulteta, Ljubljana, Slovenia
Citation
Zbornik Gozdarstva in Lesarstva, 2011, No.96, pp 3-12
Abstract

Height-increment and tree-ring width data of Scots pine from northern Fennoscandia were updated and their sample replication increased considerably. Standard chronologies as well as low-frequency chronologies were built and compared during their common period in AD 745-2007. The two chronologies...

Author(s)
Lindholm, M.; Jalkanen, R.
Publisher
Sage Publications Ltd, London, UK
Citation
Holocene, 2012, 22, 5, pp 571-577
Abstract

Twentieth-century summer (July-August) temperatures in northern Finland are reconstructed using ring widths, maximum density and stable carbon isotope ratios (δ13C) of Scots pine tree rings, and using combinations of these proxies. Verification is based on the coefficient of determination (r2),...

Author(s)
McCarroll, D.; Tuovinen, M.; Campbell, R.; Gagen, M.; Grudd, H.; Jalkanen, R.; Loader, N. J.; Robertson, I.
Publisher
John Wiley & Sons, Chichester, UK
Citation
Journal of Quaternary Science, 2011, 26, 1, pp 7-14
Abstract

New data have allowed us to extend a previous height-increment chronology of Scots pine (Pinus sylvestris L.) at the northern Fennoscandian timberline 817 years backwards in time, from 1561 to 745. Our final transfer model accounts for 31% of the dependent instrumental (mean June-August)...

Author(s)
Lindholm, M.; Jalkanen, R.; Salminen, H.; Aalto, T.; Ogurtsov, M.
Publisher
Sage Publications Ltd, London, UK
Citation
Holocene, 2011, 21, 2, pp 319-326
Abstract

A severe frost event in the winter of 1986-1987 that resulted in widespread defoliation in northern Finland was used to test the influence of such growth disturbances on tree ring parameters commonly used for palaeoclimate reconstruction. In mature pine trees (Pinus sylvestris), there was no effect ...

Author(s)
Tuovinen, M.; Jalkanen, R.; McCarroll, D.
Publisher
Geographical Society of Finland, Helsinki, Finland
Citation
Fennia, 2005, 183, 2, pp 109-117
Abstract

Scots pine (Pinus sylvestris L.) in its natural distribution range is typically classified as a monocyclic species with its predetermined apical growth. It was confirmed by the material sampled in a 50-year-old Scots pine stand from near the northern conifer timberline at Kaamanen, northern Finland ...

Author(s)
Salminen, H.; Jalkanen, R.
Publisher
Istituto Italiano di Dendrocronologia, Verona, Italy
Citation
Dendrochronologia, 2004, 21, 2, pp 79-83
Abstract

Ten potential proxy measures of past climate were recovered from Scots pine (Pinus sylvestris) at three sites on a latitudinal transect close to the pine limit in northern Finland (earlywood, latewood and annual ring width; earlywood, latewood and maximum density; stable carbon isotope ratio;...

Author(s)
McCarroll, D.; Jalkanen, R.; Hicks, S.; Tuovinen, M.; Gagen, M.; Pawellek, F.; Eckstein, D.; Schmitt, U.; Autio, J.; Heikkinen, O.
Publisher
Arnold, London, UK
Citation
Holocene, 2003, 13, 6, pp 829-838
Abstract

There are only a few examples, except tree rings, in which characters or properties of wood structure have been used in describing environmental changes. Excluding traditional dendrochronology, even rarer are methods or techniques which are able to produce retrospective data about life-time changes ...

Author(s)
Jalkanen, R.
Citation
IAWA Journal, 1998, 19, 4, pp 457-457

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