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Multicentennial Ring-Width Chronologies of Scots Pine Along a North-South Gradient Across Finland

Four regional Scots pine ring-width chronologies at the northern forest-limit, and in the northern, middle and southern boreal forest belts in Finland cover the last fourteen centuries. Tree-ring statistics and response functions were examined, and tree-ring width variation was also compared to North Atlantic Oscillation (NAO) and volcanic forcing. The tree-ring statistics show evidence of an ecogeographical gradient along a north-south transect. The three northernmost regional chronologies share a positive response to mid-summer temperature, and all four chronologies show positive and significant correlation to early-summer precipitation. Moreover, a positive and significant relationship to winter NAO was detected in three out of four regional chronologies. NAO also drives the common (inter-regional) growth variability. Years of known cool summers caused by volcanic forcing exhibit exceptionally narrow tree rings in the three northernmost regional chronologies.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/262617
Date January 2005
CreatorsHelama, Samuli, Lindholm, Markus, Meriläinen, Jouko, Timonen, Mauri, Eronen, Matti
ContributorsDepartment of Geology, University of Helsinki, Finland, Saima Centre for Environmental Sciences, University of Joensuu, Savolinna, Finland, Finnish Forest Research Institute, Rovaniemi Research Station, Rovaniemi, Finland
PublisherTree-Ring Society
Source SetsUniversity of Arizona
Languageen_US
Detected LanguageEnglish
TypeArticle
RightsCopyright © Tree-Ring Society. All rights reserved.
Relationhttp://www.treeringsociety.org

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