| A. M. Papadopoulos - INVESTIGATIONS DENDROCLIMATOLOGIQUES DU SAPIN |
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Geographia Technica, No. 2/2009, pp. 50 - 57 INVESTIGATIONS DENDROCLIMATOLOGIQUES DU SAPIN DE CEPHALONIE EN GRÈCE CENTRALEA. M. PapadopoulosABSTRACT: DENDROCLIMATIC INVESTIGATION OF FIR TREES IN CEPHALONIE, CENTRAL GREECE In this study four tree-ring widths mean (site) chronologies as well as one of their local chronology, were analyzed, according to climatic factors. The tree-ring data cover a period of 185 years (1820-2004) and resulted from the analysis of 78 wood carrots taken from 40 dominant Greek fir (Abies cephalonica) trees in Central Greece. Of the climatic data, monthly precipitations and mean monthly temperatures were used for a time period of 33 years (1972-2004). Mean sensitivity of the raw tree-rings data (SM: 0,12 -0,25) revealed the existence of a relatively strong climatic signal in tree-rings succession. Based on the Principal Components Analysis of the 4 site chronologies of the indices, the climate is responsible for a 47, 6 % of the total variance of the tree-rings width. Tree-ring to climate relationships, calculated on the level of the local chronology over the period 1972-2004, show a positive influence of June precipitations and September temperatures on tree-ring widths, and a negative one with November precipitations of the previous to tree-ring formation year. Mots Clés:dendrochronologie, dendroclimatologie, cerne, fonction de réponse, Abies cephalonica. |


