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Information Journal Paper

Title

RECONSTRUCTING THE TEMPERATURE DEGREE OF THE WARM SEASONSTHROUGH QUERCUS PERSICA TREE RINGS IN ZAGROS FORESTS DENA REGION

Writers

ZAREAN HOSSEIN

Pages

 Start Page 0 | End Page 0

Abstract

 Trees can record long-term effects of climate variables. UsingDENDROCLIMATOLOGY knowledge, we can reconstruct such variablesespecially for areas which have short-term climatic data. For thispurpose, we reconstructed the temperature degree of the warm months(May-September) through annual rings width of QUERCUS PERSICA andregression analysis of data obtained from stations on DENA REGION. With this goal in mind, three growth heights were selected in DenaForests and 52 growth samples from 26 bases were extracted and theirgrowth rings width were measured with LINTAB5 with an accuracyof 0. 01 mm. After cross dating stage, to eliminate non-climate effects, May to September temperature average and tree rings time series werestandardized. The Residual CHRONOLOGY (RES) calculated byARSTAN was calibrated with temperature degree of the period 1882-2011 and its positive and significant correlation with the width ofgrowth rings was confirmed. Based on the relations between thecalculated CHRONOLOGY and joint statistical temperature degree data, thereconstruction of temperature degree of the warm seasons for over acentury was performed and it was found that in the last three decades, region's average temperature of May to September had an increase incomparison to the average of the previous century.

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