Faculty of Biology, University of Latvia
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Acta Univ Latv (2007) 723: 163–170
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Environmental and

Acta Univ Latv (2007) 723: 163–170

Orginal Article

Scots pine pointer-years in northwestern Latvia and their relationship with climatic factors

Didzis Elferts*
Department of Botany and Ecology, Faculty of Biology, University of Latvia, Kronvalda Bulv. 4, Rīga LV-1586, Latvia
*Corresponding author, E-mail: didzis.elferts@lu.lv


At six sampling sites in northwestern Latvia Scots pines (Pinus sylvestris L.) were cored to obtain tree-ring width data and determine site pointer-year values (years with markedly wider or narrower tree-ring width compared to neighboring tree-rings). Correlation analysis was performed between pointer-year values and climatic factors (mean temperatures and precipitation sum) to determine significant relationships. There were only three years (negative 1940 and 1969, positive 1957), when all sampling sites had common pointer-years. The main climatic factors influencing development of pointer-years were February mean temperatures and June precipitation sum. Pointer-year development is mainly determined by local factors.

Key words: dendroclimatology, Pinus sylvestris, pointer-years, tree-rings.

Acta Univ Latv (2007) 723: 163–170
 DOI: http://doi.org/10.22364/eeb

Prof. Gederts Ievinsh
Published by
University of Latvia

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