Annual air temperature change characteristics in the Hamedan region of Iran

Abstract

In this research air temperature characteristics of five meteorological stations located in the<br />Hamedan region of Iran were analyzed. The main objective was to identify and assess the<br />possible climate change of the region during the period 1980 to 2010. To this end, time<br />series of the mean annual temperature were investigated using Mann-Kendall and<br />Normalized Residual Mass Curve methods. The climatological stations were Hamedan,<br />Ekbatan Dam, Dargazin, Nojeh and Varayaneh. The results showed that the Mann-Kendall<br />and Normalized Residual Mass Curve tests were similar on detection of the trends. The<br />mean annual temperatures of stations with the exception of Varayaneh and Darghazin<br />showed significant rapid increasing trends. This study illustrates the identical results of the<br />two different tests on climate change identification and more importantly a significant<br />warming at the majority of stations in the region. These results provide useful information<br />for long term planning in water management of the region.