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Spatial and temporal variation of surface water vapor over northern and southern regions of Qinling Mountains Periodic Characteristics of Distribution Pattern of Haloxylon ammodendron in Gurbantunggut Desert Based on Eco-Used Wavelet Variation characteristics of runoff coefficient of Taizi River basin in 1967-2006. Characteristics of temperature and precipitation in Northeastern China from 1961 to 2005 Extreme air temperature changes in Selin Co basin, Tibet (1961-2012)