Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

What trees tell us about

Dendrological and statistical analysis of data

Auteur (s)  : Liudmila Liutsko
Editeur  : VDM Verlag Dr. Müller
Date de parution : 25-02-2009
Pages : 68

Présentation

Trees are a great bank of data, named sometimes as the “silent witnesses” of the past. Due to annual formation of rings, which is normally influenced directly by of climate parameters (generally changes in temperature and moisture or precipitation) and other environmental factors. Using dendrochronological methods for obtaining samples of Pinus Nigra from the Catalonian PrePirineous region with total time spine of about 100 - 250 years were analyzed for the tree ring width (TRW) patterns and had quite high correlation between them (0.71 – 0.84), corresponding to a common behaviour for the environmental changes in their annual growth. Analyzing the cross-correlations between obtained tree ring width indexes and climate data, significant correlations (p0.05) were observed in some lags. These results confirm the hypothesis of using dendrochronological data as a climate signal for further analysis, such as reconstruction of climate in the past or prediction in the future for the same locality.

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