Dynamic change and influencing factors of potential evapotranspiration in the middle arid region of Ningxia Responses of phenology to climate change in Zhengzhou area Spatial and Temporal Change of Vegetation Cover in Xinjiang Based on FVC Variation characteristics of runoff coefficient of Taizi River basin in 1967-2006. Spatiotemporal variations in the reference crop evapotranspiration on the Loess Plateau during 1961-2009 Research on spatio-temporal change of temperature in the Northwest Arid Area