The existence of significant trend and change point in the aridity index (AI), precipitation, and reference evapotranspiration (ET0) was evaluated using the Mann-Kendall and Pettitt tests, respectively, over 22 semi-arid, humid, and sub-humid sites of Iran during 1966–2012. Detrending method was also employed to quantify each factor’s contribution to the AI and ET0 trends. The ET0 and AI sensitivity...
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