**Abbreviations**

Meaning of main acronyms:

CLDAS: China Meteorological Administration Land Data Assimilation System; *ET*0: Reference Crop evapotranspiration; FAO: Food and Agriculture Organization of the United Nations; ECMWF: European Center for Medium Weather Forecasting; NCEP: National Centers for Environmental Prediction; *Rs*: Global solar radiation; U: wind speed at 2 m; RH: relative humidity; *T*max: maximum temperature; *T*min: minimum temperature. (When the subscript CLD exists in these meteorological data, it is the corresponding CLDAS meteorological data); RMSE: Root Mean Square Error; MAE: Mean Absolute Error; PBias: percent bias; *R*2: coefficient of determination.
