The early investigations on
Scots pine in Lithuania (Битвинскас, 1984) based on eight
experimental plots have revealed weak relationships with climatic
factors. The coefficients of correlation did not exceed 0.44 in
absolute value. The positive link was observed between the radial
growth of pine and temperature in April and an inverse link with
precipitation in February.
Investigation in two experimental plots of pine near Kaunas was carried out in 1996 (Karpavičius et al. 1996). Based on response function analysis positive relationships with temperature of February and March and precipitation in June was found.
The latter findings partly were confirmed during investigations carried out in the Baltic coastal zone (Vitas, 2004). Pines were found to be sensitive to temperature in February and September. On the other hand, no significant links with precipitation were observed. The negative signature years during 1816-2002 in which common signal was found among at least of 80% of trees were in 1940 and 1956. Analysis has shown that in most cases they were induced by winter colds and summer droughts. The positive signature years were found in 1819, 1824, 1841, 1861, 1897, 1925, 1938, and 1967. In most cases, they were explained by warm winter, spring, and summer. The spatial analysis between several pine chronologies was also carried out. It was found that the similarity up to +0.6 is common to pines growing up to 50 kms apart each other. In spite of similar site conditions, there is no significant similarity (correlation does not exceed +0.2) between the radial growth of pines located 300 kms apart each other. Please visit the bibliography page, for references.