نویسندگان
دانشگاه
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this study, we aimed to reconstruct the mean, maximum mean and âminimum mean temperature from the chronology of tree rings width of two âQuercus Persica sites in Dena region, where efficient climatic data have a âshort period (1982-2011). The duration of common chronology of the sites âis 131 years (1881-2011).Considering the strong correlation between âclimatic data and growth rings width (P < 0.01), with positive coefficient, âwe attempted to reconstruct the variables using combined linear and âquadratic regression analysis and ring growth width from 1881 to ââ2011.Accordingly, the highest maximum temperature was in 2001-2011 âdecade and the lowest minimum temperature was during the decade 1981-ââ1991.Over the recent three decades, the average and the annual maximum âmean temperature had an increase of 0.5°c and 1°c in comparison to the âprevious century and the average annual minimum temperature has had a âdecrease of 0.2°c.â
کلیدواژهها [English]