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Stable isotope composition of precipitation in the south and north slopes of Wushaoling Mountain, northwestern ChinaStable isotope composition of precipitation in the south and north slopes of Wushaoling Mountain, northwestern China Li Zongxing a,b,, Feng Qi a, Yong Song b, Q.J.Wangb, Jiao Yang c, Li Yongge a, Li Jianguo a, Guo Xiaoyan a a Key Laboratory of Ecohydrology of Inland River Basin/Gansu Hydrology andWater Resources Engineering Research Center, Cold and Arid Region Environment and Engineering Research Institute,Chinese Academy of Sciences, Lanzhou 730000, China b CSIRO Land and Water, Private Bag 10, Clayton South, VIC 3169, Australia c Key Laboratory of Meteorological Disaster, Ministry of Education/Institute of Climate Change and Evaluation between China and UK, Nanjing University of Information Science and Technology,Nanjing 210044, China a b s t r a c t A study of spatial and temporal variability of precipitation isotope composition on the southern and north slopes of Wushaoling Mountain was conducted in order to explore the processes influencing its evolution. The analysis indicated that the isotopic composition, the slopes and intercepts of Local MeteroicWater Lines, altitude gradients and temperature effect are higher on the north slope than those on the south slope. The d-excess showed an increase fromlower to higher altitudes, and the altitude gradients changedwith season. The correlation coefficients between
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